Yoji Kiyota, Ph.D. in Informatics

Chief Data Officer, FiveVai Corporation

Principal Investigator, Group Data Division, LIFULL Co., Ltd.

Visiting Professor, AI and Business Research Center, Reitaku University

Bio: Born in Fukuoka, Japan in 1975. Since being assigned to a natural language processing laboratory at Kyoto University in 1997, he has been consistently involved in R&D around computer science and artificial intelligence (AI), such as dialog systems, text mining, information recommendation, and image processing. In 2007, when he was an assistant professor of the University of Tokyo, he co-founded Littel Corporation, a startup company from the University of Tokyo. After Littel was acquired by LIFULL Co., Ltd. in 2011, he has been engaged in R&D in the real estate tech field at LIFULL. He will also serve as CDO of Medimple Corporation from 2018 to 2022 and as Director and CDO of FiveVai Corporation from 2022. Responsible for the Information Science and Technology Association of Japan (INFOSTA), and the secretary of the SIG in ubiquitous computing system, the Information Processing Society of Japan (IPSJ). 

Japanese page

Speaker Deck

Career History

May 2022 - present: Chief Data Officer and Director, FiveVai Corporation

Implementation and utilization of AI and data science in the field of medical and business matching

April 2018 - May 2022: Chief Executive Officer, Medimpl Corporation

Implementation and utilization of AI and data science in the field of medical and business matching

April 2011 - present: Principal Investigator, LIFULL Co., Ltd.

R&D of AI utilization centering on real estate information

August 2007 - March 2011: Senior Researcher / Chief Technology Officer, Littel Corporation

Business development of library information navigation system and big data processing technology

December 2004 - March 2012: Assistant Professor / Special Lecturer, Information Technology Center, The University of Tokyo

Studies on natural language processing application on Library information navigation system

February 2004 - November 2004: Postdoctoral researcher, Kyoto University / Japan Science and Technology Agency

Research on voice interface of an automatic question answering system

April 2003 - January 2004: Industry-academia-government collaboration researcher, The University of Tokyo

Research on an automatic question answering system using large-scale text as knowledge

Research on Automatic Question Answering System Using Large-scale Text as Knowledge

<Concurrent posts>

April 2019 - March 2023: Visiting Researcher, Center for Spacial Information Science, The University of Tokyo

November 2012 - present: Researcher, School of Science and Technology for Future Life, Tokyo Denki University


2004: Ph.D in Informatics, Kyoto University

dissertation: Dialog Navigator: A Navigation System from Vague Questions to Specific Answers based on Real-World Text Collections, Graduate School of Informatics, Kyoto University, 2004. [citation] [PDF]

2000: Master in Informatics, Kyoto University

1998: Bachelor of Electricity Engineering, Kyoto University

1994: graduated from Kurume University Fusetsu High School, Fukuoka, Japan

Major Publications

Frontiers of Computer Vision Technologies on Real Estate Property Photographs and Floorplans

Yoji KiyotaIn: Asami Y., Higano Y., Fukui H. (eds) Frontiers of Real Estate Science in Japan.New Frontiers in Regional Science: Asian Perspectives, vol 29. Springer, Singapore, 2021. [citation]

Mining User Experience through Crowdsourcing: A Property Search Behavior Corpus Derived from Microblogging Timelines

Yoji Kiyota, Yasuyuki Nirei, Kosuke Shinoda, Satoshi Kurihara, and Hirohiko Suwain Proceedings of 2015 IEEE/WIC/ACM International Conference on Web Intelligence and Intelligent Agent Technology (WI-IAT), pp. 17-21, Singapore, 2015. [citation]

Discovering Serendipitous Information from Wikipedia by Using its Network Structure

Yohei Noda, Yoji Kiyota, and Hiroshi Nakagawain Proceedings of the Fourth International AAAI Conference on Weblogs and Social Media (ICWSM 2010), pp. 299-302, Washington D.C., USA, 2010. [citation] [PDF]

Exploitation of the wikipedia category system for enhancing the value of LCSH

Yoji Kiyota, Hiroshi Nakagawa, Satoshi Sakai, Tatsuya Mori, and Hidetaka Masudain Proceedings of the 9th ACM/IEEE-CS joint conference on Digital libraries (JCDL'09), pp. 411-412, Austin, Texas, USA, 2009. [citation] [PDF]

Automated Subject Induction from Query Keywords through Wikipedia Categories and Subject Headings

Yoji Kiyota, Noriyuki Tamura, Satoshi Sakai, Hiroshi Nakagawa, and Hidetaka Masudain Proceedings of the Sixth International Conference on Language Resources and Evaluation (LREC'08), pp. 3479-3482, Marrakech, Morocco, 2008. [citation] [PDF]

A Domain Ontology Production Tool Kit Based on Automatically Constructed Case Frames

Yoji Kiyota, and Hiroshi Nakagawain Proceedings of the Fifth International Conference on Language Resources and Evaluation (LREC'06), pp. 1482-1487, Genoa, Italy, 2006. [citation] [PDF]

Browsing System for Weblog Articles Based on Automated Folksonomy

Tsutomu Ohkura, Yoji Kiyota, and Hiroshi Nakagawain Proceedings of the WWW2006 Workshop on the Weblogging Ecosystem, Edinburgh, Scotland, 2006. [citation] [PDF]

Dialog navigator: A spoken dialog QA system based on large text knowledge base

Yoji Kiyota, Sadao Kurohashi, Teruhisa Misu, Kazunori Komatani, Tatsuya Kawahara, and Fuyuko Kidoin the Companion Volume to the Proceedings of 41st Annual Meeting of the Association for Computational Linguistics (ACL 2003), Sapporo, Japan, 2003. [citation] [PDF]

Dialog navigator: A question answering system based on large text knowledge base

Yoji Kiyota, Sadao Kurohashi, and Fuyuko Kidoin Proceedings of the 19th international conference on Computational linguistics (COLING 2002), Taipei, 2002. [citation] [PDF]

Automatic Summarization of Japanese Sentences and its Application to a WWW KWIC Index

Yoji Kiyota, and Sadao Kurohashiin Proceedings of 2001 Symposium on Applications and the Internet (SAINT 2001), pp. 120-127, San Diego, California, USA, 2001. [citation] [PDF]

For more details, see Google Scholar / dblp / researchmap.

Public Activities

<Current Activities>

<Past Activities>