Nihon Sumo Kyokai

Overview

Sumo wrestlers, known as rikishi, compete to advance through a strict hierarchy from Jonokuchi to Makuuchi, with Yokozuna at its apex. Professional sumo follows six annual 15-day tournaments held across Japan.

How to win

• Each match: 1 win or 1 loss recorded per rikishi (no scoring beyond W/L); Each basho: 15 days × 1 match per rikishi = up to 15 wins…
• Win or loss — Each rikishi records one win or one loss per match, with no additional scoring.
• Basho maximum — Each rikishi has one match daily for 15 days, allowing up to 15 wins.
• Kachi-koshi — Earn 8 or more wins in a 15-day basho for a winning record, promotion, and bonus.
• Make-koshi — Eight or more losses means a losing record and potential demotion.

The game

• Open-weight matches — Two rikishi compete one-on-one without weight classes; divisions range from Makuuchi to Maezumo.
• One-on-one match — Each match has two rikishi.
• Open-weight competition — All rikishi within a division compete without weight classes.
• Division order — Highest to lowest: Makuuchi, Juryo, Makushita, Sandanme, Jonidan, Jonokuchi, Maezumo.
• Makuuchi ranks — Ranks include Yokozuna, Ozeki, Sekiwake, Komusubi, and Maegashira.

Playing the ball

• No fixed time limit — matches typically last 5-30 seconds; most are over within 10 seconds; Pre-match ritual (shikiri) takes 4+ minutes; salt-throwing + facing-off; the actual bout is brief
• Win the bout — Force your opponent outside the dohyo rope with any part of their body.
• Win the bout — Force your opponent outside the rope or make any body part except their feet touch the dohyo.
• Winning techniques — Record each victory by the officially recognized kimarite used (+ variants).
• Illegal strikes and grabs — No closed-fist punches, kicking, or hair-grabbing; open-hand slaps are permitted.

Fouls & penalties

• Banned technique (kinjite): immediate loss + potential commission discipline; Mawashi failure (belt comes off during match): immediate loss (rare, considered dishonorable)…
• Banned technique — Using a kinjite causes immediate loss and may result in commission discipline.
• Mawashi failure — If the belt comes off during the match, the wrestler immediately loses.
• Henka jump — Not technically illegal, but heavily frowned upon at Yokozuna rank.
• Ritual violation — Failure to bow or observe ritual prompts a commission warning and may affect promotion.

Equipment

• Mawashi (silk belt loincloth): the rikishi's only attire during competition; ~9-13 m long, folded + wrapped around the waist + crotch; color varies by rank (Makuuchi: vibrant colored…
• Mawashi attire — Wear only a folded silk mawashi wrapped around the waist and crotch; color varies by rank.
• Chonmage topknot — All professional rikishi wear this traditional samurai-style hairstyle; ceremonial cutting marks retirement.

🚨 Cardinal Rule— Serious violation — may trigger retaliation or social exclusion

• Never celebrate or show emotion after winningProfessional play
  — A rikishi who wins must exit the dohyo without any display of joy, triumph, or relief—no raised fists, shouting, or gestures to the crowd. The winner bows, collects any prize envelope, and departs composedly. Exuberant post-win behavior is considered a serious breach of the dignity the sport demands of its participants.(Foreign rikishi from cultures where victory celebrations are normal have been publicly criticized for violations. Yokozuna Hakuho's raised-arm gestures and verbal exclamations after wins drew sustained, documented criticism from traditionalists and the Yokozuna Deliberation Council.)[1][2][3]

⚠️ Strong Expectation— Most experienced players will take notice and be upset

• A Yokozuna must retire rather than accept demotionProfessional play
  — A Yokozuna who performs poorly cannot be formally stripped of rank—the JSA has no demotion mechanism for the title. Instead, cultural and institutional pressure requires voluntary retirement. When the Yokozuna Deliberation Council issues public statements 'encouraging retirement,' this functions as a near-mandatory demand; ignoring it repeatedly is viewed as deeply dishonorable.(Yokozuna Kisenosato (retired 2019), Kakuryu (2021), and Hakuho (2021) all faced this pressure. Kakuryu's extended absence from honbasho while nominally holding the title was a particular flashpoint.)[1][2][3]
• Lose quietly—no protest, no lingering on the dohyoProfessional play
  — After a loss, the rikishi must exit immediately and in complete silence. Challenging a gyoji's call before a mono-ii (judges' review) is requested, visibly showing frustration, or lingering near the dohyo is considered disrespectful to the sport and opponent alike. A composed exit is expected regardless of the circumstances of the loss.[1][2]
• Absolute deference to the oyakata (stablemaster) within the stableProfessional play
  — Within the heya (stable), the oyakata's authority over training, scheduling, diet, and career decisions is not publicly questioned by rikishi. A wrestler who openly challenges or criticizes their stablemaster violates the foundational iemoto (master-apprentice) social contract that structures sumo stable life.(Public dissent is so rare that the few documented cases became major news stories in Japanese sports media and typically ended careers.)[1][2][3]
• A Yokozuna unable to perform dohyo-iri is expected to consider retirementProfessional play
  — The dohyo-iri ring-entering ceremony at each honbasho is both privilege and obligation for a Yokozuna. Repeatedly missing or being physically unable to complete this ceremony is understood culturally as a signal that the wrestler can no longer fulfill the rank's duties and should retire. There is no written rule—the pressure is entirely social and institutional.(Yokozuna Kakuryu's repeated tournament absences (kyujo) while retaining the rank were the central driver of sustained retirement pressure culminating in 2021.)[1][2]

📋 General Expectation— Generally expected; soft social enforcement among regulars

• Forward-moving techniques represent 'true sumo'⚡ ContestedProfessional play
  — Rikishi who win primarily through pulling, sidestepping, or retreating techniques (hatakikomi, tsukiotoshi, etc.) are criticized for warui sumo ('bad sumo') even with a winning record. The ideal is forward-driving, chest-to-chest pressure. Repeated reliance on pulling techniques is treated as both a tactical weakness and a character flaw by elders and commentators.(NHK announcers and former wrestlers invoke the 'true sumo' standard regularly in broadcasts. Lower-ranked wrestlers who pull excessively are lectured about it by stablemasters regardless of their win-loss record.)[1][2][3]
• Do not challenge or visibly criticize a gyoji (referee) decisionProfessional play
  — If a rikishi believes the gyoji made an incorrect call, the accepted channel is the mono-ii review initiated by floor judges (shimpan). Publicly arguing with, questioning, or showing displeasure toward the gyoji—before or after a review—is taboo and disrespects the centuries-old officiating tradition tied to Shinto ceremony.[1][2]

🤝 Etiquette— Nice to follow; low consequence if ignored by newcomers

• Lower-ranked rikishi serve as tsukebito (personal attendants) to senior wrestlers⚡ ContestedProfessional play
  — Within stables, lower-ranked rikishi (typically jonokuchi through juryo) are expected to serve as personal attendants to higher-ranked wrestlers—preparing food, assisting with dress, carrying equipment, and performing domestic tasks. The specific obligations are governed by unwritten, stable-specific custom rather than JSA regulation.(The tsukebito system has come under scrutiny in the context of power harassment (pawaharā) scandals, where the line between accepted custom and abuse was debated in public investigations.)[1][2]