Answer:
Mountains: Mount Fuji (Fujisan), Mt. Ato, the Japanese Alps
Rivers: Shinano River (longest river in Japan 367 km),Teishio,Tokachi (both main rivers in Hokkido), Yoshino river
Lakes: Lake Biwa, Lake Kattura (cleanest fresh water lake)
Plains: Kanto Plains
Lowest point: Hachiro-gata