Shigeo Mitsunari is a software developer and researcher. He is interested in cryptography, in particular, pairing-based cryptography and its implementation. He developes a x86/x64 JIT assembler Xbyak and very fast C++ pairing library which are open source projects. He was received MITOH Super Creator by IPA in 2003, the Chairman Awards by Information Promotion consortium in 2005, the Best paper award by IEICE in 2010.