What Is a Basho?
A basho is a grand sumo tournament. There are six held each year at fixed locations and dates, and together they form the backbone of the professional sumo calendar. Each basho lasts 15 days. Every wrestler in the top division (Makuuchi) competes once per day, every day, giving them exactly 15 bouts to determine their final record.
The Six Annual Tournaments
| Tournament | Month | Location |
|---|---|---|
| Hatsu Basho | January | Tokyo (Ryogoku Kokugikan) |
| Haru Basho | March | Osaka (Edion Arena Osaka) |
| Natsu Basho | May | Tokyo (Ryogoku Kokugikan) |
| Nagoya Basho | July | Nagoya (Dolphins Arena) |
| Aki Basho | September | Tokyo (Ryogoku Kokugikan) |
| Kyushu Basho | November | Fukuoka (Fukuoka Convention Center) |
How Bouts Are Scheduled
The matchmaking committee (torikumi committee) sets each day's bouts, announced the evening before. They aim to create compelling matchups based on current records and rank. Wrestlers with similar win-loss records are matched against each other as the tournament progresses — this creates natural drama as the leaders inevitably face one another in the final days.
Top-ranked wrestlers (Yokozuna, Ozeki) typically face their toughest opponents in the last five days of the tournament, known as the jungyo stretch — this is when championships are decided.
Understanding Wins and Losses
- Kachi-koshi (8–7 or better): A winning record. Guarantees rank maintenance or promotion.
- Make-koshi (7–8 or worse): A losing record. Results in demotion, with more losses meaning a steeper fall.
- Yusho: The tournament championship, awarded to the wrestler with the most wins. In the event of a tie, a playoff bout determines the winner.
- Special Prizes: Three additional prizes are awarded — Outstanding Performance (Kantosho), Technique (Ginosho), and Fighting Spirit (Shukunsho).
What to Watch During a Bout
A sumo bout can last anywhere from under a second to several minutes. Here's what to focus on:
- The tachi-ai (initial charge): The explosive collision at the start. Getting a strong tachi-ai is often decisive — it determines who controls the tempo of the bout.
- The grip (mawashi battle): Wrestlers try to secure a favorable hold on the opponent's belt. Certain grips — like the uwate (outer grip) — are generally considered advantageous.
- Throwing and pushing techniques: There are 82 officially recognized winning techniques in sumo. Common ones include yorikiri (force out), oshidashi (push out), and uwatenage (outer arm throw).
- The tawara (boundary): Stepping outside the circular ring or touching the clay with any part of the body other than the soles of the feet results in a loss.
Where to Watch
NHK World broadcasts sumo tournament highlights in English, making it accessible to international fans. The official NHK app and website stream daily highlights, with full-day coverage available on NHK's main channels in Japan. The Japan Sumo Association also maintains an official English-language website with live scores, results, and the current banzuke.
If you're in Japan, attending in person is the definitive experience. Tickets are sold through official channels and can sell out quickly for popular tournaments — especially during a close yusho race in the final weekend.
Getting Hooked
Once you understand the structure of a basho, sumo becomes remarkably easy to follow and deeply compelling. Pick a wrestler to root for, track the daily results, and by Day 13 or 14 of a tournament, you'll be fully invested in the yusho race. That's the magic of the basho.