国際学会口頭発表又はポスターのみ

（単著）Algorithms on matching of digraphs, A Seminar in "Internat.Congress Math." (ICM78), 　1978, Helsinki-Finland.
Shun-ichi Nakagawa, Tomokazu Arita, Youzou Miyadera, Kensei Tsuchida, Kiyonobu Tomiyama, and Takeo Yaku, A visual programming environment based23rd Internat. Conf. Software Engin (ICSE2001), 2001, Poster Session, Tronto, Canada.
2. Kensei Nomaki, Takeo Yaku et. al., Octal graph representation of multi resolution 3D landform maps, SIAM Conference on Geometric Design and ComputationGD05), 2005.11.
3. Tomokazu Arita, Kensei Tsuchida and Takeo Yaku, Syntactic Characterization of the Two-dimensional Grid Graphs by a Graph Grammar, AUTOMATA2006, Hiroshima, 2006.
Takaaki Goto, Kenji Ruise, Kensei Tsuchida, and Takeo Yaku, Precedence Graph Grammar for Hierarchical Program Diagram, International Symposium on Advanced ICT (AICT2006), August 8, 2006, Univ. Electro-Comm., Tokyo
Y. Shiono, Tomokazu Arita, Tadaaki Kirishima, Kensei Tsuchida, and Takeo Yaku, XML Representation Based on Octa-grid for Table Processing AICT2006 3A-5 http://ftth.ice.uec.ac.jp/aict2006/index.html

IEEE　ICALT 2007
SIAM GD 2007
Satoshi Kishira, Kimio Sugita, Kensehi Nomaki, Kensei Tsuchida and Takeo Yaku, INSTICC-GRAPP 2009, Lisboa, Portgal