The research and development on tritium technology and studies on tritium science in Japan have been conducted in the national institutes (JAERI, NIRS and others), the universities, and industries. In fusion fuel technology, the technological R&D of tritium processing and handling has been carried out by TPL of JAERI, including collaboration with TSTA (DOE/LANL) and basic and innovative research is conducted by the universities. Since the last meeting at Albuquerque there are many accomplishments in the above reearches which will be summarized here with some results.