Development of a web framework for teaching and learning japanese prosody: OJAD (online japanese accent dictionary)

Ibuki Nakamura, Nobuaki Minematsu, Masayuki Suzuki, Hiroko Hirano, Chieko Nakagawa, Noriko Nakamura, Yukinori Tagawa, Keikichi Hirose, Hiroya Hashimoto

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


This paper introduces the first online and free framework for teaching and learning Japanese prosody including word accent and phrase intonation. This framework is called OJAD (Online Japanese Accent Dictionary) [1] and it provides three functions. 1) Visual, auditory, systematic, and comprehensive illustration of patterns of accent change (accent sandhi) of verbs and ad- jectives. Here only the changes caused by twelve kinds of fun- damental conjugation are focused upon. 2) Visual illustration of the accent pattern of a given verbal expression, which is a combination of a verb and its postpositional auxiliary words. 3) Visual illustration of the pitch pattern of an any given sentence and the expected positions of accent nuclei in the sentence. The third function is implemented by using an accent change pre- diction module that we developed for Japanese text-to-speech (TTS) synthesizers [2, 3]. Experiments show that accent nu- cleus assignment to given texts by the proposed framework is much more accurate than that by native speakers. Subjective assessment and objective assessment by teachers and learners show very high pedagogical effectiveness of the framework.

Original languageEnglish
Pages (from-to)2554-2558
Number of pages5
JournalUnknown Journal
Publication statusPublished - 2013


  • Accent sandhi
  • Assessment experiments
  • Japanese prosody
  • Language education
  • OJAD
  • Speech synthesis

ASJC Scopus subject areas

  • Language and Linguistics
  • Human-Computer Interaction
  • Signal Processing
  • Software
  • Modelling and Simulation


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