Before coming to Kyoto in 2003, he had been involved in the Belle experiment as a graduate student at the University of Tokyo. He worked with the silicon vertex detector and the observation of time-dependent CP asymmetry in the B meson system. Currently he is working for T2K neutrino oscillation experiment as the convener of the muon monitor group and co-convener of the near detector photo-sensor working group. He has also spent past year at Fermilab to lead the commissioning of SciBooNE neutrino scattering experiment.