[config.json] tokenizer_class: BertJapaneseTokenizer

config.json

@@ -14,6 +14,7 @@
   "num_attention_heads": 12,
   "num_hidden_layers": 12,
   "pad_token_id": 0,
+  "tokenizer_class": "BertJapaneseTokenizer",
   "type_vocab_size": 2,
   "vocab_size": 4000
 }