diff --git a/utils/addjson.py b/utils/addjson.py
new file mode 100755
index 00000000..7fabe625
--- /dev/null
+++ b/utils/addjson.py
@@ -0,0 +1,155 @@
+#!/usr/bin/env python3
+# encoding: utf-8
+
+# Copyright 2018 Nagoya University (Tomoki Hayashi)
+#  Apache 2.0  (http://www.apache.org/licenses/LICENSE-2.0)
+
+from __future__ import print_function
+from __future__ import unicode_literals
+
+import argparse
+import codecs
+import json
+import logging
+import sys
+
+from distutils.util import strtobool
+
+from espnet.utils.cli_utils import get_commandline_args
+
+is_python2 = sys.version_info[0] == 2
+
+
+def get_parser():
+    parser = argparse.ArgumentParser(
+        description="add multiple json values to an input or output value",
+        formatter_class=argparse.ArgumentDefaultsHelpFormatter,
+    )
+    parser.add_argument("jsons", type=str, nargs="+", help="json files")
+    parser.add_argument(
+        "-i",
+        "--is-input",
+        default=True,
+        type=strtobool,
+        help="If true, add to input. If false, add to output",
+    )
+    parser.add_argument("--verbose", "-V", default=0, type=int, help="Verbose option")
+    return parser
+
+
+if __name__ == "__main__":
+    parser = get_parser()
+    args = parser.parse_args()
+
+    # logging info
+    logfmt = "%(asctime)s (%(module)s:%(lineno)d) %(levelname)s: %(message)s"
+    if args.verbose > 0:
+        logging.basicConfig(level=logging.INFO, format=logfmt)
+    else:
+        logging.basicConfig(level=logging.WARN, format=logfmt)
+    logging.info(get_commandline_args())
+
+    # make intersection set for utterance keys
+    js = []
+    intersec_ks = []
+    for x in args.jsons:
+        with codecs.open(x, "r", encoding="utf-8") as f:
+            j = json.load(f)
+        ks = j["utts"].keys()
+        logging.info(x + ": has " + str(len(ks)) + " utterances")
+        if len(intersec_ks) > 0:
+            intersec_ks = intersec_ks.intersection(set(ks))
+            if len(intersec_ks) == 0:
+                logging.warning("Empty intersection")
+                break
+        else:
+            intersec_ks = set(ks)
+        js.append(j)
+    logging.info("new json has " + str(len(intersec_ks)) + " utterances")
+
+    # updated original dict to keep intersection
+    intersec_org_dic = dict()
+    for k in intersec_ks:
+        v = js[0]["utts"][k]
+        intersec_org_dic[k] = v
+
+    intersec_add_dic = dict()
+    for k in intersec_ks:
+        v = js[1]["utts"][k]
+        for j in js[2:]:
+            v.update(j["utts"][k])
+        intersec_add_dic[k] = v
+
+    new_dic = dict()
+    for key_id in intersec_org_dic:
+        orgdic = intersec_org_dic[key_id]
+        adddic = intersec_add_dic[key_id]
+
+        if "utt2spk" not in orgdic:
+            orgdic["utt2spk"] = ""
+        # NOTE: for machine translation
+
+        # add as input
+        if args.is_input:
+            # original input
+            input_list = orgdic["input"]
+            # additional input
+            in_add_dic = {}
+            if "idim" in adddic and "ilen" in adddic:
+                in_add_dic["shape"] = [int(adddic["ilen"]), int(adddic["idim"])]
+            elif "idim" in adddic:
+                in_add_dic["shape"] = [int(adddic["idim"])]
+            # add all other key value
+            for key, value in adddic.items():
+                if key in ["idim", "ilen"]:
+                    continue
+                in_add_dic[key] = value
+            # add name
+            in_add_dic["name"] = "input%d" % (len(input_list) + 1)
+
+            input_list.append(in_add_dic)
+            new_dic[key_id] = {
+                "input": input_list,
+                "output": orgdic["output"],
+                "utt2spk": orgdic["utt2spk"],
+            }
+        # add as output
+        else:
+            # original output
+            output_list = orgdic["output"]
+            # additional output
+            out_add_dic = {}
+            # add shape
+            if "odim" in adddic and "olen" in adddic:
+                out_add_dic["shape"] = [int(adddic["olen"]), int(adddic["odim"])]
+            elif "odim" in adddic:
+                out_add_dic["shape"] = [int(adddic["odim"])]
+            # add all other key value
+            for key, value in adddic.items():
+                if key in ["odim", "olen"]:
+                    continue
+                out_add_dic[key] = value
+            # add name
+            out_add_dic["name"] = "target%d" % (len(output_list) + 1)
+
+            output_list.append(out_add_dic)
+            new_dic[key_id] = {
+                "input": orgdic["input"],
+                "output": output_list,
+                "utt2spk": orgdic["utt2spk"],
+            }
+            if "lang" in orgdic.keys():
+                new_dic[key_id]["lang"] = orgdic["lang"]
+
+    # ensure "ensure_ascii=False", which is a bug
+    jsonstring = json.dumps(
+        {"utts": new_dic},
+        indent=4,
+        ensure_ascii=False,
+        sort_keys=True,
+        separators=(",", ": "),
+    )
+    sys.stdout = codecs.getwriter("utf-8")(
+        sys.stdout if is_python2 else sys.stdout.buffer
+    )
+    print(jsonstring)
diff --git a/utils/scp2json.py b/utils/scp2json.py
new file mode 100755
index 00000000..8e8de3e0
--- /dev/null
+++ b/utils/scp2json.py
@@ -0,0 +1,48 @@
+#!/usr/bin/env python3
+# encoding: utf-8
+
+# Copyright 2017 Johns Hopkins University (Shinji Watanabe)
+#  Apache 2.0  (http://www.apache.org/licenses/LICENSE-2.0)
+from __future__ import print_function
+from __future__ import unicode_literals
+
+import argparse
+import codecs
+import json
+import sys
+
+is_python2 = sys.version_info[0] == 2
+
+
+def get_parser():
+    parser = argparse.ArgumentParser(
+        description="convert scp to json",
+        formatter_class=argparse.ArgumentDefaultsHelpFormatter,
+    )
+    parser.add_argument("--key", "-k", type=str, help="key")
+    return parser
+
+
+if __name__ == "__main__":
+    parser = get_parser()
+    args = parser.parse_args()
+
+    new_line = {}
+    sys.stdin = codecs.getreader("utf-8")(sys.stdin if is_python2 else sys.stdin.buffer)
+    sys.stdout = codecs.getwriter("utf-8")(
+        sys.stdout if is_python2 else sys.stdout.buffer
+    )
+    line = sys.stdin.readline()
+    while line:
+        x = line.rstrip().split()
+        v = {args.key: " ".join(x[1:])}
+        new_line[x[0]] = v
+        line = sys.stdin.readline()
+
+    all_l = {"utts": new_line}
+
+    # ensure "ensure_ascii=False", which is a bug
+    jsonstring = json.dumps(
+        all_l, indent=4, ensure_ascii=False, sort_keys=True, separators=(",", ": ")
+    )
+    print(jsonstring)
diff --git a/utils/tokenizer.perl b/utils/tokenizer.perl
new file mode 100644
index 00000000..ae97d658
--- /dev/null
+++ b/utils/tokenizer.perl
@@ -0,0 +1,596 @@
+#!/usr/bin/env perl
+#
+# This file is part of moses.  Its use is licensed under the GNU Lesser General
+# Public License version 2.1 or, at your option, any later version.
+
+use warnings;
+
+# Sample Tokenizer
+### Version 1.1
+# written by Pidong Wang, based on the code written by Josh Schroeder and Philipp Koehn
+# Version 1.1 updates:
+#       (1) add multithreading option "-threads NUM_THREADS" (default is 1);
+#       (2) add a timing option "-time" to calculate the average speed of this tokenizer;
+#       (3) add an option "-lines NUM_SENTENCES_PER_THREAD" to set the number of lines for each thread (default is 2000), and this option controls the memory amount needed: the larger this number is, the larger memory is required (the higher tokenization speed);
+### Version 1.0
+# $Id: tokenizer.perl 915 2009-08-10 08:15:49Z philipp $
+# written by Josh Schroeder, based on code by Philipp Koehn
+
+binmode(STDIN, ":utf8");
+binmode(STDOUT, ":utf8");
+
+use warnings;
+use FindBin qw($RealBin);
+use strict;
+use Time::HiRes;
+
+if  (eval {require Thread;1;}) {
+  #module loaded
+  Thread->import();
+}
+
+my $mydir = "$RealBin/../share/nonbreaking_prefixes";
+
+my %NONBREAKING_PREFIX = ();
+my @protected_patterns = ();
+my $protected_patterns_file = "";
+my $language = "en";
+my $QUIET = 0;
+my $HELP = 0;
+my $AGGRESSIVE = 0;
+my $SKIP_XML = 0;
+my $TIMING = 0;
+my $NUM_THREADS = 1;
+my $NUM_SENTENCES_PER_THREAD = 2000;
+my $PENN = 0;
+my $NO_ESCAPING = 0;
+while (@ARGV)
+{
+	$_ = shift;
+	/^-b$/ && ($| = 1, next);
+	/^-l$/ && ($language = shift, next);
+	/^-q$/ && ($QUIET = 1, next);
+	/^-h$/ && ($HELP = 1, next);
+	/^-x$/ && ($SKIP_XML = 1, next);
+	/^-a$/ && ($AGGRESSIVE = 1, next);
+	/^-time$/ && ($TIMING = 1, next);
+  # Option to add list of regexps to be protected
+  /^-protected/ && ($protected_patterns_file = shift, next);
+	/^-threads$/ && ($NUM_THREADS = int(shift), next);
+	/^-lines$/ && ($NUM_SENTENCES_PER_THREAD = int(shift), next);
+	/^-penn$/ && ($PENN = 1, next);
+	/^-no-escape/ && ($NO_ESCAPING = 1, next);
+}
+
+# for time calculation
+my $start_time;
+if ($TIMING)
+{
+    $start_time = [ Time::HiRes::gettimeofday( ) ];
+}
+
+# print help message
+if ($HELP)
+{
+	print "Usage ./tokenizer.perl (-l [en|de|...]) (-threads 4) < textfile > tokenizedfile\n";
+        print "Options:\n";
+        print "  -q     ... quiet.\n";
+        print "  -a     ... aggressive hyphen splitting.\n";
+        print "  -b     ... disable Perl buffering.\n";
+        print "  -time  ... enable processing time calculation.\n";
+        print "  -penn  ... use Penn treebank-like tokenization.\n";
+        print "  -protected FILE  ... specify file with patters to be protected in tokenisation.\n";
+	print "  -no-escape ... don't perform HTML escaping on apostrophy, quotes, etc.\n";
+	exit;
+}
+
+if (!$QUIET)
+{
+	print STDERR "Tokenizer Version 1.1\n";
+	print STDERR "Language: $language\n";
+	print STDERR "Number of threads: $NUM_THREADS\n";
+}
+
+# load the language-specific non-breaking prefix info from files in the directory nonbreaking_prefixes
+load_prefixes($language,\%NONBREAKING_PREFIX);
+
+if (scalar(%NONBREAKING_PREFIX) eq 0)
+{
+	print STDERR "Warning: No known abbreviations for language '$language'\n";
+}
+
+# Load protected patterns
+if ($protected_patterns_file)
+{
+  open(PP,$protected_patterns_file) || die "Unable to open $protected_patterns_file";
+  while(<PP>) {
+    chomp;
+    push @protected_patterns, $_;
+  }
+}
+
+my @batch_sentences = ();
+my @thread_list = ();
+my $count_sentences = 0;
+
+if ($NUM_THREADS > 1)
+{# multi-threading tokenization
+    while(<STDIN>)
+    {
+        $count_sentences = $count_sentences + 1;
+        push(@batch_sentences, $_);
+        if (scalar(@batch_sentences)>=($NUM_SENTENCES_PER_THREAD*$NUM_THREADS))
+        {
+            # assign each thread work
+            for (my $i=0; $i<$NUM_THREADS; $i++)
+            {
+                my $start_index = $i*$NUM_SENTENCES_PER_THREAD;
+                my $end_index = $start_index+$NUM_SENTENCES_PER_THREAD-1;
+                my @subbatch_sentences = @batch_sentences[$start_index..$end_index];
+                my $new_thread = new Thread \&tokenize_batch, @subbatch_sentences;
+                push(@thread_list, $new_thread);
+            }
+            foreach (@thread_list)
+            {
+                my $tokenized_list = $_->join;
+                foreach (@$tokenized_list)
+                {
+                    print $_;
+                }
+            }
+            # reset for the new run
+            @thread_list = ();
+            @batch_sentences = ();
+        }
+    }
+    # the last batch
+    if (scalar(@batch_sentences)>0)
+    {
+        # assign each thread work
+        for (my $i=0; $i<$NUM_THREADS; $i++)
+        {
+            my $start_index = $i*$NUM_SENTENCES_PER_THREAD;
+            if ($start_index >= scalar(@batch_sentences))
+            {
+                last;
+            }
+            my $end_index = $start_index+$NUM_SENTENCES_PER_THREAD-1;
+            if ($end_index >= scalar(@batch_sentences))
+            {
+                $end_index = scalar(@batch_sentences)-1;
+            }
+            my @subbatch_sentences = @batch_sentences[$start_index..$end_index];
+            my $new_thread = new Thread \&tokenize_batch, @subbatch_sentences;
+            push(@thread_list, $new_thread);
+        }
+        foreach (@thread_list)
+        {
+            my $tokenized_list = $_->join;
+            foreach (@$tokenized_list)
+            {
+                print $_;
+            }
+        }
+    }
+}
+else
+{# single thread only
+    while(<STDIN>)
+    {
+        if (($SKIP_XML && /^<.+>$/) || /^\s*$/)
+        {
+            #don't try to tokenize XML/HTML tag lines
+            print $_;
+        }
+        else
+        {
+            print &tokenize($_);
+        }
+    }
+}
+
+if ($TIMING)
+{
+    my $duration = Time::HiRes::tv_interval( $start_time );
+    print STDERR ("TOTAL EXECUTION TIME: ".$duration."\n");
+    print STDERR ("TOKENIZATION SPEED: ".($duration/$count_sentences*1000)." milliseconds/line\n");
+}
+
+#####################################################################################
+# subroutines afterward
+
+# tokenize a batch of texts saved in an array
+# input: an array containing a batch of texts
+# return: another array containing a batch of tokenized texts for the input array
+sub tokenize_batch
+{
+    my(@text_list) = @_;
+    my(@tokenized_list) = ();
+    foreach (@text_list)
+    {
+        if (($SKIP_XML && /^<.+>$/) || /^\s*$/)
+        {
+            #don't try to tokenize XML/HTML tag lines
+            push(@tokenized_list, $_);
+        }
+        else
+        {
+            push(@tokenized_list, &tokenize($_));
+        }
+    }
+    return \@tokenized_list;
+}
+
+# the actual tokenize function which tokenizes one input string
+# input: one string
+# return: the tokenized string for the input string
+sub tokenize
+{
+    my($text) = @_;
+
+    if ($PENN) {
+      return tokenize_penn($text);
+    }
+
+    chomp($text);
+    $text = " $text ";
+
+    # remove ASCII junk
+    $text =~ s/\s+/ /g;
+    $text =~ s/[\000-\037]//g;
+
+    # Find protected patterns
+    my @protected = ();
+    foreach my $protected_pattern (@protected_patterns) {
+      my $t = $text;
+      while ($t =~ /(?<PATTERN>$protected_pattern)(?<TAIL>.*)$/) {
+        push @protected, $+{PATTERN};
+        $t = $+{TAIL};
+      }
+    }
+
+    for (my $i = 0; $i < scalar(@protected); ++$i) {
+      my $subst = sprintf("THISISPROTECTED%.3d", $i);
+      $text =~ s,\Q$protected[$i], $subst ,g;
+    }
+    $text =~ s/ +/ /g;
+    $text =~ s/^ //g;
+    $text =~ s/ $//g;
+
+    # separate out all "other" special characters
+    if (($language eq "fi") or ($language eq "sv")) {
+        # in Finnish and Swedish, the colon can be used inside words as an apostrophe-like character:
+        # USA:n, 20:een, EU:ssa, USA:s, S:t
+        $text =~ s/([^\p{IsAlnum}\s\.\:\'\`\,\-])/ $1 /g;
+        # if a colon is not immediately followed by lower-case characters, separate it out anyway
+        $text =~ s/(:)(?=$|[^\p{Ll}])/ $1 /g;
+    }
+    elsif ($language eq "tdt") {
+        # in Tetun, the apostrophe can be used inside words as an apostrophe-like character:
+        $text =~ s/([^\p{IsAlnum}\s\.\'\`\,\-])/ $1 /g;
+        # if an apostrophe is not immediately followed by lower-case characters, separate it out anyway
+        $text =~ s/(\')(?=$|[^\p{Ll}])/ $1 /g;
+    }
+    elsif (($language eq "ca")) {
+        # in Catalan, the middle dot can be used inside words:
+        # il�lusio
+        $text =~ s/([^\p{IsAlnum}\s\.\·\'\`\,\-])/ $1 /g;
+        # if a middot is not immediately followed by lower-case characters, separate it out anyway
+        $text =~ s/(·)(?=$|[^\p{Ll}])/ $1 /g;
+    }   
+    else {
+        $text =~ s/([^\p{IsAlnum}\s\.\'\`\,\-])/ $1 /g;
+    }
+
+    # aggressive hyphen splitting
+    if ($AGGRESSIVE)
+    {
+        $text =~ s/([\p{IsAlnum}])\-(?=[\p{IsAlnum}])/$1 \@-\@ /g;
+    }
+
+    #multi-dots stay together
+    $text =~ s/\.([\.]+)/ DOTMULTI$1/g;
+    while($text =~ /DOTMULTI\./)
+    {
+        $text =~ s/DOTMULTI\.([^\.])/DOTDOTMULTI $1/g;
+        $text =~ s/DOTMULTI\./DOTDOTMULTI/g;
+    }
+
+    # seperate out "," except if within numbers (5,300)
+    #$text =~ s/([^\p{IsN}])[,]([^\p{IsN}])/$1 , $2/g;
+
+    # separate out "," except if within numbers (5,300)
+    # previous "global" application skips some:  A,B,C,D,E > A , B,C , D,E
+    # first application uses up B so rule can't see B,C
+    # two-step version here may create extra spaces but these are removed later
+    # will also space digit,letter or letter,digit forms (redundant with next section)
+    $text =~ s/([^\p{IsN}])[,]/$1 , /g;
+    $text =~ s/[,]([^\p{IsN}])/ , $1/g;
+    
+    # separate "," after a number if it's the end of a sentence
+    $text =~ s/([\p{IsN}])[,]$/$1 ,/g;
+
+    # separate , pre and post number
+    #$text =~ s/([\p{IsN}])[,]([^\p{IsN}])/$1 , $2/g;
+    #$text =~ s/([^\p{IsN}])[,]([\p{IsN}])/$1 , $2/g;
+
+    # turn `into '
+    #$text =~ s/\`/\'/g;
+
+    #turn '' into "
+    #$text =~ s/\'\'/ \" /g;
+
+    if ($language eq "en")
+    {
+        #split contractions right
+        $text =~ s/([^\p{IsAlpha}])[']([^\p{IsAlpha}])/$1 ' $2/g;
+        $text =~ s/([^\p{IsAlpha}\p{IsN}])[']([\p{IsAlpha}])/$1 ' $2/g;
+        $text =~ s/([\p{IsAlpha}])[']([^\p{IsAlpha}])/$1 ' $2/g;
+        $text =~ s/([\p{IsAlpha}])[']([\p{IsAlpha}])/$1 '$2/g;
+        #special case for "1990's"
+        $text =~ s/([\p{IsN}])[']([s])/$1 '$2/g;
+    }
+    elsif (($language eq "fr") or ($language eq "it") or ($language eq "ga") or ($language eq "ca"))
+    {
+        #split contractions left
+        $text =~ s/([^\p{IsAlpha}])[']([^\p{IsAlpha}])/$1 ' $2/g;
+        $text =~ s/([^\p{IsAlpha}])[']([\p{IsAlpha}])/$1 ' $2/g;
+        $text =~ s/([\p{IsAlpha}])[']([^\p{IsAlpha}])/$1 ' $2/g;
+        $text =~ s/([\p{IsAlpha}])[']([\p{IsAlpha}])/$1' $2/g;
+    }
+    elsif (($language eq "so")  or ($language eq "tdt"))
+    {
+        # Don't split glottals
+        $text =~ s/([^\p{IsAlpha}])[']([^\p{IsAlpha}])/$1 ' $2/g;
+        $text =~ s/([^\p{IsAlpha}])[']([\p{IsAlpha}])/$1 ' $2/g;
+        $text =~ s/([\p{IsAlpha}])[']([^\p{IsAlpha}])/$1 ' $2/g;
+    }
+    else
+    {
+        $text =~ s/\'/ \' /g;
+    }
+
+    #word token method
+    my @words = split(/\s/,$text);
+    $text = "";
+    for (my $i=0;$i<(scalar(@words));$i++)
+    {
+        my $word = $words[$i];
+        if ( $word =~ /^(\S+)\.$/)
+        {
+            my $pre = $1;
+            if ($i == scalar(@words)-1) {
+                # split last words independently as they are unlikely to be non-breaking prefixes
+                $word = $pre." .";
+            }
+            elsif (($pre =~ /\./ && $pre =~ /\p{IsAlpha}/) || ($NONBREAKING_PREFIX{$pre} && $NONBREAKING_PREFIX{$pre}==1) || ($i<scalar(@words)-1 && ($words[$i+1] =~ /^[\p{IsLower}]/)))
+            {
+                #no change
+            }
+            elsif (($NONBREAKING_PREFIX{$pre} && $NONBREAKING_PREFIX{$pre}==2) && ($i<scalar(@words)-1 && ($words[$i+1] =~ /^[0-9]+/)))
+            {
+                #no change
+            }
+            else
+            {
+                $word = $pre." .";
+            }
+        }
+        $text .= $word." ";
+    }
+
+    # clean up extraneous spaces
+    $text =~ s/ +/ /g;
+    $text =~ s/^ //g;
+    $text =~ s/ $//g;
+
+    # .' at end of sentence is missed
+    $text =~ s/\.\' ?$/ . ' /;
+
+    # restore protected
+    for (my $i = 0; $i < scalar(@protected); ++$i) {
+      my $subst = sprintf("THISISPROTECTED%.3d", $i);
+      $text =~ s/$subst/$protected[$i]/g;
+    }
+
+    #restore multi-dots
+    while($text =~ /DOTDOTMULTI/)
+    {
+        $text =~ s/DOTDOTMULTI/DOTMULTI./g;
+    }
+    $text =~ s/DOTMULTI/./g;
+
+    #escape special chars
+    if (!$NO_ESCAPING)
+      {
+	$text =~ s/\&/\&amp;/g;   # escape escape
+	$text =~ s/\|/\&#124;/g;  # factor separator
+	$text =~ s/\</\&lt;/g;    # xml
+	$text =~ s/\>/\&gt;/g;    # xml
+	$text =~ s/\'/\&apos;/g;  # xml
+	$text =~ s/\"/\&quot;/g;  # xml
+	$text =~ s/\[/\&#91;/g;   # syntax non-terminal
+	$text =~ s/\]/\&#93;/g;   # syntax non-terminal
+      }
+
+    #ensure final line break
+    $text .= "\n" unless $text =~ /\n$/;
+
+    return $text;
+}
+
+sub tokenize_penn
+{
+    # Improved compatibility with Penn Treebank tokenization.  Useful if
+    # the text is to later be parsed with a PTB-trained parser.
+    #
+    # Adapted from Robert MacIntyre's sed script:
+    #   http://www.cis.upenn.edu/~treebank/tokenizer.sed
+
+    my($text) = @_;
+    chomp($text);
+
+    # remove ASCII junk
+    $text =~ s/\s+/ /g;
+    $text =~ s/[\000-\037]//g;
+
+    # attempt to get correct directional quotes
+    $text =~ s/^``/`` /g;
+    $text =~ s/^"/`` /g;
+    $text =~ s/^`([^`])/` $1/g;
+    $text =~ s/^'/`  /g;
+    $text =~ s/([ ([{<])"/$1 `` /g;
+    $text =~ s/([ ([{<])``/$1 `` /g;
+    $text =~ s/([ ([{<])`([^`])/$1 ` $2/g;
+    $text =~ s/([ ([{<])'/$1 ` /g;
+    # close quotes handled at end
+
+    $text =~ s=\.\.\.= _ELLIPSIS_ =g;
+
+    # separate out "," except if within numbers (5,300)
+    $text =~ s/([^\p{IsN}])[,]([^\p{IsN}])/$1 , $2/g;
+    # separate , pre and post number
+    $text =~ s/([\p{IsN}])[,]([^\p{IsN}])/$1 , $2/g;
+    $text =~ s/([^\p{IsN}])[,]([\p{IsN}])/$1 , $2/g;
+
+    #$text =~ s=([;:@#\$%&\p{IsSc}])= $1 =g;
+$text =~ s=([;:@#\$%&\p{IsSc}\p{IsSo}])= $1 =g;
+
+    # Separate out intra-token slashes.  PTB tokenization doesn't do this, so
+    # the tokens should be merged prior to parsing with a PTB-trained parser
+    # (see syntax-hyphen-splitting.perl).
+    $text =~ s/([\p{IsAlnum}])\/([\p{IsAlnum}])/$1 \@\/\@ $2/g;
+
+    # Assume sentence tokenization has been done first, so split FINAL periods
+    # only.
+    $text =~ s=([^.])([.])([\]\)}>"']*) ?$=$1 $2$3 =g;
+    # however, we may as well split ALL question marks and exclamation points,
+    # since they shouldn't have the abbrev.-marker ambiguity problem
+    $text =~ s=([?!])= $1 =g;
+
+    # parentheses, brackets, etc.
+    $text =~ s=([\]\[\(\){}<>])= $1 =g;
+    $text =~ s/\(/-LRB-/g;
+    $text =~ s/\)/-RRB-/g;
+    $text =~ s/\[/-LSB-/g;
+    $text =~ s/\]/-RSB-/g;
+    $text =~ s/{/-LCB-/g;
+    $text =~ s/}/-RCB-/g;
+
+    $text =~ s=--= -- =g;
+
+    # First off, add a space to the beginning and end of each line, to reduce
+    # necessary number of regexps.
+    $text =~ s=$= =;
+    $text =~ s=^= =;
+
+    $text =~ s="= '' =g;
+    # possessive or close-single-quote
+    $text =~ s=([^'])' =$1 ' =g;
+    # as in it's, I'm, we'd
+    $text =~ s='([sSmMdD]) = '$1 =g;
+    $text =~ s='ll = 'll =g;
+    $text =~ s='re = 're =g;
+    $text =~ s='ve = 've =g;
+    $text =~ s=n't = n't =g;
+    $text =~ s='LL = 'LL =g;
+    $text =~ s='RE = 'RE =g;
+    $text =~ s='VE = 'VE =g;
+    $text =~ s=N'T = N'T =g;
+
+    $text =~ s= ([Cc])annot = $1an not =g;
+    $text =~ s= ([Dd])'ye = $1' ye =g;
+    $text =~ s= ([Gg])imme = $1im me =g;
+    $text =~ s= ([Gg])onna = $1on na =g;
+    $text =~ s= ([Gg])otta = $1ot ta =g;
+    $text =~ s= ([Ll])emme = $1em me =g;
+    $text =~ s= ([Mm])ore'n = $1ore 'n =g;
+    $text =~ s= '([Tt])is = '$1 is =g;
+    $text =~ s= '([Tt])was = '$1 was =g;
+    $text =~ s= ([Ww])anna = $1an na =g;
+
+    #word token method
+    my @words = split(/\s/,$text);
+    $text = "";
+    for (my $i=0;$i<(scalar(@words));$i++)
+    {
+        my $word = $words[$i];
+        if ( $word =~ /^(\S+)\.$/)
+        {
+            my $pre = $1;
+            if (($pre =~ /\./ && $pre =~ /\p{IsAlpha}/) || ($NONBREAKING_PREFIX{$pre} && $NONBREAKING_PREFIX{$pre}==1) || ($i<scalar(@words)-1 && ($words[$i+1] =~ /^[\p{IsLower}]/)))
+            {
+                #no change
+            }
+            elsif (($NONBREAKING_PREFIX{$pre} && $NONBREAKING_PREFIX{$pre}==2) && ($i<scalar(@words)-1 && ($words[$i+1] =~ /^[0-9]+/)))
+            {
+                #no change
+            }
+            else
+            {
+                $word = $pre." .";
+            }
+        }
+        $text .= $word." ";
+    }
+
+    # restore ellipses
+    $text =~ s=_ELLIPSIS_=\.\.\.=g;
+
+    # clean out extra spaces
+    $text =~ s=  *= =g;
+    $text =~ s=^ *==g;
+    $text =~ s= *$==g;
+
+    #escape special chars
+    $text =~ s/\&/\&amp;/g;   # escape escape
+    $text =~ s/\|/\&#124;/g;  # factor separator
+    $text =~ s/\</\&lt;/g;    # xml
+    $text =~ s/\>/\&gt;/g;    # xml
+    $text =~ s/\'/\&apos;/g;  # xml
+    $text =~ s/\"/\&quot;/g;  # xml
+    $text =~ s/\[/\&#91;/g;   # syntax non-terminal
+    $text =~ s/\]/\&#93;/g;   # syntax non-terminal
+
+    #ensure final line break
+    $text .= "\n" unless $text =~ /\n$/;
+
+    return $text;
+}
+
+sub load_prefixes
+{
+    my ($language, $PREFIX_REF) = @_;
+
+    my $prefixfile = "$mydir/nonbreaking_prefix.$language";
+
+    #default back to English if we don't have a language-specific prefix file
+    if (!(-e $prefixfile))
+    {
+        $prefixfile = "$mydir/nonbreaking_prefix.en";
+        print STDERR "WARNING: No known abbreviations for language '$language', attempting fall-back to English version...\n";
+        die ("ERROR: No abbreviations files found in $mydir\n") unless (-e $prefixfile);
+    }
+
+    if (-e "$prefixfile")
+    {
+        open(PREFIX, "<:utf8", "$prefixfile");
+        while (<PREFIX>)
+        {
+            my $item = $_;
+            chomp($item);
+            if (($item) && (substr($item,0,1) ne "#"))
+            {
+                if ($item =~ /(.*)[\s]+(\#NUMERIC_ONLY\#)/)
+                {
+                    $PREFIX_REF->{$1} = 2;
+                }
+                else
+                {
+                    $PREFIX_REF->{$item} = 1;
+                }
+            }
+        }
+        close(PREFIX);
+    }
+}
\ No newline at end of file
diff --git a/utils/update_json.sh b/utils/update_json.sh
new file mode 100755
index 00000000..bf697475
--- /dev/null
+++ b/utils/update_json.sh
@@ -0,0 +1,88 @@
+#!/bin/bash
+
+# Copyright 2020 Kyoto University (Hirofumi Inaguma)
+#  Apache 2.0  (http://www.apache.org/licenses/LICENSE-2.0)
+
+echo "$0 $*" >&2 # Print the command line for logging
+. ./path.sh
+
+nlsyms=""
+oov="<unk>"
+bpecode=""
+verbose=0
+
+text=""
+multilingual=false
+
+help_message=$(cat << EOF
+Usage: $0 <json> <data-dir> <dict>
+e.g. $0 data/train data/lang_1char/train_units.txt
+Options:
+  --oov <oov-word>                                 # Default: <unk>
+  --verbose <num>                                  # Default: 0
+EOF
+)
+. utils/parse_options.sh
+
+if [ $# != 3 ]; then
+    echo "${help_message}" 1>&2
+    exit 1;
+fi
+
+set -euo pipefail
+
+json=$1
+dir=$2
+dic=$3
+json_dir=$(dirname ${json})
+tmpdir=$(mktemp -d ${dir}/tmp-XXXXX)
+trap 'rm -rf ${tmpdir}' EXIT
+
+if [ -z ${text} ]; then
+    text=${dir}/text
+fi
+
+# 2. Create scp files for outputs
+mkdir -p ${tmpdir}/output
+if [ -n "${bpecode}" ]; then
+    if [ ${multilingual} = true ]; then
+        # remove a space before the language ID
+        paste -d " " <(awk '{print $1}' ${text}) <(cut -f 2- -d" " ${text} \
+            | spm_encode --model=${bpecode} --output_format=piece | cut -f 2- -d" ") \
+            > ${tmpdir}/output/token.scp
+    else
+        paste -d " " <(awk '{print $1}' ${text}) <(cut -f 2- -d" " ${text} \
+            | spm_encode --model=${bpecode} --output_format=piece) \
+            > ${tmpdir}/output/token.scp
+    fi
+elif [ -n "${nlsyms}" ]; then
+    text2token.py -s 1 -n 1 -l ${nlsyms} ${text} > ${tmpdir}/output/token.scp
+else
+    text2token.py -s 1 -n 1 ${text} > ${tmpdir}/output/token.scp
+fi
+< ${tmpdir}/output/token.scp utils/sym2int.pl --map-oov ${oov} -f 2- ${dic} > ${tmpdir}/output/tokenid.scp
+awk '{print $1 " " NF-1}' ${tmpdir}/output/tokenid.scp > ${tmpdir}/output/olen.scp
+# +2 comes from CTC blank and EOS
+vocsize=$(tail -n 1 ${dic} | awk '{print $2}')
+odim=$(echo "$vocsize + 2" | bc)
+awk -v odim=${odim} '{print $1 " " odim}' ${text} > ${tmpdir}/output/odim.scp
+
+cat ${text} > ${tmpdir}/output/text.scp
+
+
+# 4. Create JSON files from each scp files
+rm -f ${tmpdir}/*/*.json
+for x in "${tmpdir}"/output/*.scp; do
+    k=$(basename ${x} .scp)
+    < ${x} scp2json.py --key ${k} > ${tmpdir}/output/${k}.json
+done
+
+# add to json
+addjson.py --verbose ${verbose} -i false \
+  ${json} ${tmpdir}/output/text.json ${tmpdir}/output/token.json ${tmpdir}/output/tokenid.json ${tmpdir}/output/olen.json ${tmpdir}/output/odim.json > ${tmpdir}/data.json
+mkdir -p ${json_dir}/.backup
+echo "json updated. original json is kept in ${json_dir}/.backup."
+cp ${json} ${json_dir}/.backup/"$(basename ${json})"
+cp ${tmpdir}/data.json ${json}
+
+rm -fr ${tmpdir}