The are a Japanese women's softball team based in Yokohama, Kanagawa. The Sundiva compete in the Japan Diamond Softball League (JD.League) as a member of the league's East Division.
The Sundiva were founded in 1985 as Hitachi Software (a factory of Hitachi) softball team and joined the Japan Softball League in 1991.
The Japan Diamond Softball League (JD.League) was founded in 2022, and the Sundiva became part of the new league as a member of the East Division.