code: def get_tokenizer(self, **kwargs):
      return BertJapaneseTokenizer.from_pretrained(
          self.tmpdirname, subword_tokenizer_type="character", **kwargs
      )
  
imports: import os
  import pickle
  import unittest
  from transformers import AutoTokenizer
  from transformers.models.bert.tokenization_bert import BertTokenizer
  from transformers.models.bert_japanese.tokenization_bert_japanese import VOCAB_FILES_NAMES, BertJapaneseTokenizer, CharacterTokenizer, JumanppTokenizer, MecabTokenizer, SudachiTokenizer, WordpieceTokenizer
  from transformers.testing_utils import custom_tokenizers, require_jumanpp, require_sudachi
  from ...test_tokenization_common import TokenizerTesterMixin
label_desc: Use image node_id 2 for calling the BertJapaneseCharacterTokenizationTest obj's underlying member method code with example usage: obj.get_tokenizer() and returns: BertJapaneseTokenizer