As the excursion, we will visit to JPARC and Joyo. JPARC is High Intensity Proton Accelerator Facility, which aims to pursue frontier science in particle physics, nuclear physics, materials science, life science and nuclear technology, using a new proton accelerator complex at the highest beam power in the world. Joyo is an experimental fast reactor, which was constructed as the first step in sodium cooled fast reactor development in JAPAN. The KASKA prototype tried to measure neutrino data there.