The most famous traditional sport of Japan is sumo wrestling. It has a long history in Japanese culture and is closely connected with the country's traditions, ceremonies, and national identity.
However, if you're asking about the most popular modern sport in Japan, baseball is often considered one of the country's biggest sports.

Why Is Sumo Wrestling Famous in Japan?
Sumo is more than just a competitive sport in Japan. It has strong connections to Japanese history and Shinto traditions. Professional sumo matches are held in large arenas, and the sport follows many traditional rituals and customs.
A professional sumo wrestler, known as a rikishi, competes by trying to force an opponent out of the ring or make them touch the ground with a body part other than the soles of their feet.
Japan has a professional sumo system with major tournaments held throughout the year.
Is Baseball Popular in Japan?
Yes. Baseball is extremely popular in Japan and has a huge following at both professional and school levels.
Japan has a highly developed professional baseball league, and high-school baseball is also a major sporting event. The annual National High School Baseball Championship, commonly known as Koshien, attracts enormous attention across the country.
Japan has also achieved major international success in baseball, helping make the sport an important part of modern Japanese sporting culture.
Other Famous Sports in Japan
Japan is associated with several other sports, including:
Judo – A Japanese martial art and Olympic sport.
Karate – A martial art that originated in Okinawa and became internationally popular.
Football (soccer) – One of Japan's most popular modern sports.
Baseball – One of the country's biggest spectator and professional sports.
Sumo wrestling – Japan's most famous traditional sport.
Volleyball – Particularly popular at school and professional levels.
Sumo vs. Baseball: Which Is More Famous?
It depends on what you mean by “famous.”
Sumo is the sport most strongly associated with traditional Japanese culture and is often described as Japan's national sport.
Baseball is one of the most popular sports in everyday modern Japan, with professional teams, school competitions, and a large fan base.
Simple Answer
If someone asks, “What is the famous sport of Japan?”, the simplest answer is:
Sumo wrestling is Japan's most famous traditional sport and is widely regarded as the country's national sport. Baseball, however, is one of Japan's most popular modern sports.
So, sumo represents Japan's sporting tradition, while baseball represents much of its modern sporting culture.
