Hanchan

Definition

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 four hands where each player serves as the dealer once.

Detailed Explanation

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 eight hands total:

• 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 after each hand. 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
• Iishanten (一荘天): A full four-round game (North Round included), lasting twice as long
• Multiple Hanchan: Tournaments may consist of several consecutive hanchan to determine rankings

Usage Example

“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) - A shortened format consisting only of the East Round; half the length of a hanchan, used when time is limited.

East Round (Tonpuu) - The first four hands of a hanchan where wind tiles designate player positions; establishes initial rankings before the South Round.

South Round - The final four hands of a hanchan; completion of this round finalizes all scores and determines the game’s outcome.

Oya (親) - The dealer position, rotating through each player during a hanchan; the oya receives payment bonuses when winning and pays bonuses when losing.

Dealer - The player holding the oya position in a given hand; in a hanchan, each player serves as dealer exactly twice.