Toshiba Brave Lupus Tokyo is a Japanese rugby union team in the Japan Rugby League One. They are based in Fuchu, Tokyo, as is their local rival Suntory Sungoliath. They won the second ever Top League championship in the 2004-5 season and the Microsoft Cup in 2005 under their innovative and inventive coach Masahiro Kunda, himself a former hooker for Toshiba and Japan. They are particularly known for the strength of their mauls. Before the Top League was created, the team was called Toshiba Fuchu after their location. Their slogan for 2006 season was "Once again to the Pinnacle (Restart)". The team rebranded as Toshiba Brave Lupus Tokyo ahead of the rebranding of the Top League to Japan Rugby League One in 2022.

Japan Rugby League One is a rugby union competition in Japan. It is the highest level of professional rugby competition in the country. The Japan Rugby Football Union created the competition in 2003, by absorbing the Japan Company Rugby Football Championship, to drive up the overall standard and popularity of the sport and improve the results of the Japan national rugby union team. The chief architect of the league was Hiroaki Shukuzawa who strongly felt the urgency of improving Japanese domestic company rugby to a professional level which would allow Japan to compete more convincingly at Rugby World Cups.