Definition of Word Accuracy in Japanese

• Definition of words depends on morphological analyzer
  $\Rightarrow$ ChaSen
• Segmentation is still non-deterministic
  (Ex.) ``とも + に'' $\rightarrow$ ``ともに''
  $\Rightarrow$ Align after concatenating compounds
• Notation (use of Kanji/Kana) is also arbitrary
  (Ex.) ``十二'' $\rightarrow$ ``12''
  (Ex.) ``一人'' $\rightarrow$ ``ひとり''
  But   ``操作'' $\neq$ ``捜査''
  $\Rightarrow$ Define accuracy in both Kanji-basis & Kana-basis