The Hitachi Sundiva (日立サンディーバ, Hitachi Sandība) 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.

[1] The Sundiva were founded in 1985 as Hitachi Software (a factory of Hitachi) softball team and joined the Japan Softball League in 1991.

[2] 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.

[3]