Researched and developed idea creation support systems using KJ method at International Institute for Advanced Study of Social Information Science (Fujitsu Ltd.) from 1993 to 1997. Researched XML native store database at Fujitsu Laboratories from 1997 to 2000. Researched and developed genome information extraction and management systems at Celester Lexico-Sciences (a small venture company of genome drug discovery) from 2000 to 2005. Researched and developed document classification systems and chatbot systems at Yahoo Japan from 2005. Member of IEEE CS, ACM, IPSJ, JSAI.