diff --git a/codes/data/audio/voice_tokenizer.py b/codes/data/audio/voice_tokenizer.py
index 86fd89fa..ff7157aa 100644
--- a/codes/data/audio/voice_tokenizer.py
+++ b/codes/data/audio/voice_tokenizer.py
@@ -32,17 +32,30 @@ def remove_extraneous_punctuation(word):
 
 class VoiceBpeTokenizer:
     def __init__(self, vocab_file, preprocess=None):
+        with open(vocab_file, 'r', encoding='utf-8') as f:
+            vocab = json.load(f)
+
+        self.language = vocab['model']['language'] if 'language' in vocab['model'] else None
+
         if preprocess is None:
-            with open(vocab_file, 'r', encoding='utf-8') as f:
-                vocab = json.load(f)
-                self.preprocess = 'pre_tokenizer' in vocab and vocab['pre_tokenizer']
+            self.preprocess = 'pre_tokenizer' in vocab and vocab['pre_tokenizer']
         else:
             self.preprocess = preprocess
+
         if vocab_file is not None:
             self.tokenizer = Tokenizer.from_file(vocab_file)
 
     def preprocess_text(self, txt):
-        txt = english_cleaners(txt)
+        if self.language == 'ja':
+            import pykakasi
+
+            kks = pykakasi.kakasi()
+            results = kks.convert(txt)
+            txt = " ".join([ result['kana'] for result in results ])
+            txt = basic_cleaners(txt)
+        else:
+            txt = english_cleaners(txt)
+            
         return txt
 
     def encode(self, txt):