# Shanpon — Riichi Mahjong Glossary

> A dual pon wait where you need one of two different pairs to complete a triplet. Offers 4 winning tiles but is less flexible than ryanmen waits.

**Source:** https://www.mahjongmaster.co/learn/riichi/glossary/shanpon/
**Author:** Kenji Tanaka (https://www.mahjongmaster.co/about/kenji-tanaka/)
**Publisher:** Mahjong Master (https://www.mahjongmaster.co)
**Published:** 2026-02-18
**Updated:** 2026-03-10
**Japanese:** 双碰
**Category:** hand-structure
**Variant:** general

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## Shanpon

**Shanpon** (双碰, しゃんぽん) is a two-way pon wait, a hand configuration where you are waiting on two different pairs to complete a triplet, offering flexibility in which tile completes your wait.

## How Shanpon plays out at the table

In mahjong, a shanpon wait occurs when your last two groups are two pairs, such as 5-5 of bamboo and East-East, and either tile completes a triplet (5-5-5 or East-East-East) while the other pair remains your pair. This creates a dual waiting pattern where success depends on drawing from two distinct tile types.

### Structure and Mechanics

A shanpon wait is any two pairs anywhere in the hand, in any suits or honors. For example:
- 5-5 man plus 8-8 pin waits on 5-man or 8-pin
- 33445 waits on 3 or 4
- 77889 waits on 7 or 8

When you draw either waiting tile, one pair completes into a triplet, leaving you with a new pair from the remaining tiles. This is fundamentally different from a simple pair wait (tanki), where only one specific tile completes your hand.

### Wait Quality Assessment

Shanpon waits are considered **moderate-strength waits** in mahjong strategy:

**Advantages:**
- Offers 4 total tiles to complete the wait (two of each type remain, since you hold two of each)
- More flexible than a tanki wait, which offers only 3 tiles
- Provides multiple winning paths

**Disadvantages:**
- Less flexible than ryanmen (two-sided wait) or other open-ended waits
- Requires one of two specific tile types rather than a broader range
- May be blocked if opponents discard neither waiting tile type
- Typically valued lower than ryanmen in hand development

### Strategic Considerations

When evaluating a shanpon wait, consider:
- **Tile safety**: How many of each waiting tile have already been discarded?
- **Hand efficiency**: Does the shanpon serve your overall hand development?
- **Opponent pressure**: Are you in a position where waiting is viable, or do you need to pursue other patterns?
- **Combination potential**: Can the shanpon develop into stronger waits through subsequent draws?

Shanpon waits are common in mid-game development and often appear when transitioning between different hand patterns.

## Seeing Shanpon in play

Consider a hand: 11223 45m 67p 11s 33z

This hand contains a shanpon wait on the 11223m sequence. You are waiting for either 1m or 2m:
- Drawing 1m completes 111m (a triplet)
- Drawing 2m completes 222m (a triplet)

If you draw 1m, your hand becomes: 111223 45m 67p 11s 33z, leaving you with a pair of 2m to work with in subsequent turns. The flexibility of having two different winning tiles makes shanpon a practical waiting pattern, though it's generally considered less efficient than ryanmen in competitive play.

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*This content is from [Mahjong Master](https://www.mahjongmaster.co), a free educational reference for riichi (Japanese) and American (NMJL) mahjong. When citing this page, please link to https://www.mahjongmaster.co/learn/riichi/glossary/shanpon/.*