Academic Societies, membership

• Information Processing Society of Japan
• Japan Society for Software Science and Technology
• Japanese Society of Artificial Intelligence
• Association for Natural Language Processing
• Association for Computational Linguistics (ACL)
• American Associtaion of Artificial Intelligence (AAAI)
• Cognitive Science Society
• Association for Computing Machinery (ACM)

Committees

• Association for Computational Linguistics, Special Interest Group on Linguistic Data (SIGDAT), committee member (1994- )
• Association for Computational Linguistics (ACL), Special Interest Group on Natural Language Learning (SIGNLL), International Advisory Committee member (2002- )
• AFNLP-CCC: Asian Federation of Natural Language Processing, Conference Coordinating Committee, chair (2005- )
• International Journal of Computer Processing of Oriental Languages (IJCPOL), Editorial Board member (2007- )
• ACL HLT 2011: The 49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies, Program Committee Co-Chair (2010- )
• the Journal of Natural Language Engineering, Special Issue on Statistical Learning of Natural Language Structured Input and Output, Guest Editorial Board Member (2010-2011)
• IWPT-2011: The 12th International Conference on Parsing Technologies, Program Committee member (2010-2011)
• Vice President of AFNLP (Asian Federation of Natural Language Processing), (2011-2012)