Aichi Prefectural Gymnasium (愛知県体育館, Aichi-ken Taiikukan), also known as Dolphins Arena (ドルフィンズアリーナ, Dorufinzu Ariina), is a multi-purpose gymnasium in Nagoya, Japan, built in 1964.

Located on the site of the secondary enclosure of Nagoya Castle, it is host to numerous concerts and events.

The gymnasium has 4,375 fixed seats and can accommodate an additional 3,032 on the floor for certain events, giving it a total maximum capacity of 7,407.

[2] It won the 7th annual Building Contractors Society Award in 1966.

Dolphins acquired its naming rights (JPY 25 million, three years) in 2018.