He received his B.E. from Kyushu Institute of Technology in 2000, and his M.S. and Ph.D. from Kyushu University in 2002 and 2003, respectively. He was a pos-doc researcher of JST and of the University of Helsinki, in 2003 and 2004. He became a pos-doc of Kyoto University in 2005, and then a research fellow of JSPS. He became a research associate professor of Kyushu University in 2006. His current research interests include string processing algorithms, and design and modeling of social information infrastructure. He is a member of EATCS.