

Small mountain reservoir framed by steep forested slopes and the Shiromaru Dam — excellent for mirror-like reflections, seasonal colors (autumn maples, spring greens) and misty morning moods. Best at sunrise and early morning for calm water and low crowds; golden hour softens the mountains. Accessible by car (limited parking near the dam) or via the JR Okutama Line/nearby bus stops; short walks on maintained trails. No formal entry fee but weather can change quickly; pack layers. Respect local /


Small mountain reservoir framed by steep forested slopes and the Shiromaru Dam — excellent for mirror-like reflections, seasonal colors (autumn maples, spring greens) and misty morning moods. Best at sunrise and early morning for calm water and low crowds; golden hour softens the mountains. Accessible by car (limited parking near the dam) or via the JR Okutama Line/nearby bus stops; short walks on maintained trails. No formal entry fee but weather can change quickly; pack layers. Respect local /