Fishery of shijimi shells (Corbicula japonica) was a thriving industry, but it decreased as the lake became less brackish.
Hachirōgata is located in the coastal flatlands northeastern Akita Prefecture, bordered by the remnant of Lake Hachirōgata which lies in the west of the town.
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The area of present-day Hachirōgata was part of ancient Dewa Province, dominated by the Satake clan during the Edo period, who ruled Kubota Domain under the Tokugawa shogunate.
Iikawa is located in the coastal flatlands northeastern Akita Prefecture, bordered by the remnant of Lake Hachirōgata which lies in the west of the town.