Lake Mashu

湖 - The large characters in the middle is "Mashū-ko" or Lake Mashū. The third character "ko" means lake. Names of lakes almost always ends with this word. Lake Mashū, one of the cleanest and most transparent lakes in Japan, is within a national park called "Akan Kokuritsu Kōen" as indicated by the small characters at the top.

Place: Lake Mashū, Hokkaido