Hachirōgata (八郎潟, Hachirō-gata) is a lake in the Akita Prefecture in northern Japan. Its formal name is Lake Hachirō (八郎湖 Hachirō-ko), but it is also called Hachirōgata Regulating Pond (八郎潟調整池 Hachirō-gata chōseichi).