International Commission on Mathematical Instruction
https://www.mathunion.org/icmi/
University of Tsukuba
http://www.tsukuba.ac.jp/en/
Japan Society of Mathematical Education
http://www.sme.or.jp/en/
Tsukuba City
http://www.tsukubainfo.jp/
Tsukuba International Congress Center
https://www.epochal.or.jp/eng/
Ministry of Foreign Affairs of Japan
http://www.mofa.go.jp/index.html