Kamaishi Seawaves is a professional rugby union team based in Kamaishi, Japan. Founded in 2013, the team competes in Japan's top league, the Top League. They aim to promote rugby in the region and have a strong community focus, engaging local fans and youth through various programs. The team's home matches are played at the Kamaishi Unosumai Memorial Stadium, which was rebuilt after the 2011 tsunami. The Seawaves have gained recognition for their competitive spirit and commitment to revitalizing the local area through sports and community involvement.