Hanchan
By Kenji Tanaka · Updated
Definition
A hanchan is the standard game length: an East round plus a South round, the deal passing through all four seats in each, for a minimum of eight hands. It is the format serious play assumes; tonpuusen, the East-only game, is the quick alternative. Early hands reward building value, and the late South round turns into a placement battle where the score gaps dictate who pushes and who protects.
Hanchan
Hanchan at a glance
Hanchan (半荘) is a half-game in riichi mahjong consisting of both the East Round (Tonpuu) and South Round, representing the standard game length for competitive play. Each round includes a minimum of four hands, with each player serving as dealer at least once; dealer repeats add more hands.
Hanchan in detail
Hanchan is the fundamental unit of mahjong competition and casual play. The term breaks down into two characters: “han” (半) meaning half, and “chan” (荘) meaning a complete round or game. This nomenclature reflects mahjong’s traditional structure, where a full game (yonma, or four-player game) historically consisted of four rounds: East, South, West, and North. A hanchan therefore represents half of this traditional full game.
Structure and Composition
A hanchan consists of a minimum of eight hands:
- East Round (Tonpuu): Four hands where players rotate through the dealer position
- South Round: Four additional hands with the same rotation pattern
During each hand, one player serves as the oya (dealer), while the other three are ko (non-dealers). The dealer position rotates counterclockwise whenever the dealer fails to win the hand; a dealer who wins (or is tenpai at a draw) repeats. When all four players have dealt once in a round, that round concludes and the next round begins.
Scoring and Settlement
Hanchan games typically employ the standard point system where players begin with 25,000 points. Point transactions occur based on hand results, with winners collecting from losers according to fu (base points) and han (value) calculations. At the conclusion of a hanchan, final scores are calculated and players settle accounts, often converting remaining points into monetary exchanges in gambling contexts or simply recording scores in casual play.
Competitive Significance
Hanchan is the standard format for organized riichi mahjong tournaments and casual club play worldwide. Its eight-hand length provides sufficient statistical depth to showcase skill while remaining practical for tournament scheduling. This length balances the need for meaningful play against luck variance with reasonable time commitments, typically lasting 45 minutes to two hours depending on player speed and rule variations.
Variations and Extensions
While hanchan is standard, some venues and tournaments employ variations:
- Tonpuu (東風): Only the East Round, consisting of four hands, used for quicker games
- Iichan (一荘): A full four-round game (West and North Rounds included), lasting twice as long
- Multiple Hanchan: Tournaments may consist of several consecutive hanchan to determine rankings
Seeing Hanchan in play
“We played a quick hanchan at the mahjong parlor last night. I made dealer during the South Round and caught a tanyao hand that helped me finish in second place.”
In this context, the speaker indicates they completed a standard eight-hand game and specifically references events during the South Round portion.
Related Terms
Tonpuu
東風
Tonpuu (tonpuusen) is the East-only game, half the length of a full hanchan: the deal passes once around the table and the game ends. It is the default for quick online matches. The compression changes strategy more than beginners expect. With no South round to repair a bad start, early leads harden fast, aggressive lines get rewarded, and the placement math of the endgame arrives by the fourth hand instead of the eighth.
East Round
東場
The East round (tonba) opens every game, with East as the prevailing wind: East triplets score yakuhai for everyone, and the deal passes once through all four seats. A tonpuu game ends when it does; a hanchan continues into the South round. It is where positions get established and where hot dealers do their early damage.
South Round
南場
The South round (nanba) is the back half of a hanchan, with South triplets now scoring as the round wind. It contains the endgame: placement decides most rule sets, so the score gaps start dictating play, trailing players push, leaders defend, and the final hand (all-last) is the sharpest positioning moment in the game.