Kempei joined NTT in 1989 after getting bachelors degree from International Christian University, Tokyo. Since 1993, has devoted most of the time to global and internet business for NTT. Starting from participating in the buildout and operation of R&E network, moved on to creating NTT’s first global internet backbone in 1997, and now being the head of engineering for internet services offered by NTT Communications. He also participated in some of the submarine cable projects, and was board member of PCLC, owner of PC-1 cable system.