Research

RESEARCH GRANTS

・Research projects under Grant-in-Aid for Scientific Research (KAKENHI)

COLLABORATIVE RESEARCH PROJECTS

・Research Institute for Languages and Cultures of Asia and Africa at Tokyo University of Foreign Studies (April 2021-)

・National Institute for Japanese Language and Linguistics

　A Multifaceted Study of Spoken Language Using a Large-scale Corpus of Everyday Japanese Conversation (April 2016- March 2022)

A Comprehensive Study of Spoken Language Using a Multi-Generational Corpus of Japanese Conversation (April 2022-)

・Tohoku University (April 2019- March 2022)

　Language Change and Language Variation Research Unit (Japanese)

RESEARCH TOPICS

Acoustic properties of natural speech

・Phonemic contrasts in Japanese (e.g., singleton/geminate consonants, voicing) and contrastive hyper-articulation

・Effects of informativity and predictability on phonetic implementation (e.g., duration of singletons and geminates)

・Pitch range variation and its sociophonetic aspects in Japanese (with Celeste Guillemot)

Variation and change in Japanese

・Linguistic and extra-linguistic aspects of segment deletion/reduction

・Nominative/accusative alternation (with Satoshi Nambu and David Oshima)

・Patterns of OCP effects in rendaku/sequential voicing and devoicing of voiced geminates

・Dynamic aspects of word frequency effects on variation and change

・Morphophonological change in verbal inflections (e.g. causative forms, potential forms, adjectives)

・Modeling of variation and change by Probabilistic Optimality Theory/MaxEnt Grammar

・Prosodic structure and allophonic realization (/g/ in Japanese)

・Devoicing of voiced geminates in Japanese (with Shigeto Kawahara)

・Rendaku/sequential voicing in Japanese (with Shigeto Kawahara)

・Change in licensing condition of NPI (zenzen in Japanese)