十和田湖
Wainai was born in what is now Kazuno, Akita in 1858. He initially began his career in 1881 in the mining industry, then the backbone of Kazuno's economy, working at Kosaka Mines, which worked iron ore deposits at the shore of Lake Towada. At the time, Lake Towada was largely sterile, and the 2500 mine workers had to subsist on dried fish from town. Wainai worked as a guard on the water supply to the mines, and decided to ignore local folklore and superstition against stocking the lake with fish. Starting in 1884, Wainai attempted to introduce 600 salmon fry into Lake Towada. The effort failed, but persevering in the face of multiple setbacks and failures to the extent that he was forced to sell his personal belongings to continue the effort, Wainai finally succeeded in 1903 after a majority of trout fry he had released two years earlier survived. Wainai continued his efforts in following years, establishing a hatchery to attempt to introduce other varieties of fish as well. Today, thanks to Wainai's efforts, and many other species flourish in Lake Towada, making it a very popular fishing spot.