Iwase Sake Brewery Co., Ltd.

Iwase Sake Brewery is a coastal brewery located near Onjuku beach known for crafting distinct, mineral-rich sake. The facility specializes in complex aged koshu, uniquely utilizing natural hard well water that is naturally filtered through prehistoric shell layers.

Commenters consistently praise the brewery for its high-quality sake and compelling background story. Many also share enthusiasm for incorporating a visit into broader explorations of Chiba's rural landscapes, temples, and coastal train routes.