Lake Motosuko is a real lake in Shizuoka Prefecture, Japan, and it's indeed famous for its stunning view of Mount Fuji, which is also featured on the 1000 yen bill. The lake's clear blue waters and serene surroundings make it a popular spot for relaxation, photography, and sightseeing.

The nearby Aokigahara Forest, also known as the "Sea of Trees," is another popular destination, known for its unique landscape and eerie atmosphere.

Additionally, Lake Motosuko is located near the Fuji Five Lakes area, which offers more scenic views, hiking trails, and outdoor activities. The Fuji-Q Highland amusement park is also nearby, featuring roller coasters and other attractions.

So, if you ever find yourself in Japan, Lake Motosuko and its surrounding areas are definitely worth a visit!