Final answer:
Volcanoes are the most common natural feature in Japan.
Step-by-step explanation:
The most common natural feature in Japan is volcanoes. Japan is located in the Pacific Ring of Fire, a region known for its seismic activity and volcanic eruptions. There are over 100 active volcanoes in Japan, including Mount Fuji, which is one of the most famous volcanoes in the country.
Learn more about Natural features in Japan