# Ryanpeikou (二盃口) — Riichi Mahjong Yaku

> The hand contains two separate sets of identical sequences (two iipeiko patterns).

**Source:** https://www.mahjongmaster.co/learn/riichi/yaku/ryanpeikou/
**Author:** Kenji Tanaka (https://www.mahjongmaster.co/about/kenji-tanaka/)
**Publisher:** Mahjong Master (https://www.mahjongmaster.co)
**Published:** 2026-02-14
**Updated:** 2026-03-10
**Japanese:** 二盃口 (Ryanpeikou)
**Han value:** 3 han
**Category:** sequence
**Difficulty:** advanced
**Frequency:** very-rare
**Closed only:** yes

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## Overview

Ryanpeikou, two sets of identical sequences, is a 3-han yaku, available only on a closed hand, formed when your hand contains two separate pairs of identical sequences, for example two runs of 2-3-4 and two runs of 6-7-8. It is the doubled, upgraded form of iipeikou, and because it requires four sequences arranged as two identical pairs plus a pair, it is among the higher-value closed sequence yaku. Ryanpeikou cannot coexist with chiitoitsu under standard rules, since the same tiles are scored as a standard four-meld hand rather than seven pairs, and the four-meld reading takes priority for its higher value. It pairs well with pinfu, tanyao, junchan, and chinitsu, and a closed ryanpeikou loaded with dora can climb into haneman territory. Because it needs a very specific doubled structure, ryanpeikou is uncommon and usually emerges from a tightly one-or-two-suited closed hand with repeating runs.

## Conditions

- The hand must contain two different pairs of identical sequences (e.g., two copies of 1-2-3m and two copies of 5-6-7p)
- The hand must be fully concealed (closed only); any open call disqualifies this yaku
- Worth 3 han, closed only
- Ryanpeikou supersedes iipeiko; if you have ryanpeikou, you do not also count iipeiko
- Although a ryanpeikou hand can look identical to a chiitoitsu hand tile-for-tile, the two yaku are mutually exclusive; you score one or the other, not both
- The pair must be separate from the four sequences

## Strategy Tips

- Ryanpeikou is extremely rare and should not be actively pursued. Instead, recognize it when you are already building toward iipeiko and notice a second pair of identical sequences forming.
- Since the hand must be closed, avoid calling chi even when tempting tiles appear. Maintaining a closed hand preserves the option for ryanpeikou and also keeps pinfu and riichi as potential additions.
- If your hand qualifies as both ryanpeikou and chiitoitsu in terms of tile composition, choose whichever interpretation gives you a higher score. Ryanpeikou at 3 han typically scores higher than chiitoitsu at 2 han, especially if you can also count pinfu or tanyao.

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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/yaku/ryanpeikou/.*