# What Is Yaku in Mahjong? A Beginner's Guide to Hand Requirements
> Yaku is a scoring pattern your mahjong hand must contain to win. Learn what yaku means, why riichi requires it, and the 5 easiest yaku to aim for.
**Source:** https://www.mahjongmaster.co/blog/what-is-yaku-mahjong-beginners-guide/
**Author:** Kenji Tanaka (https://www.mahjongmaster.co/about/kenji-tanaka/)
**Publisher:** Mahjong Master (https://www.mahjongmaster.co)
**Published:** 2026-05-10
**Updated:** 2026-05-10
**Category:** strategy
**Difficulty:** beginner
**Variant:** riichi
**Tags:** yaku, riichi, beginners, rules, hand-requirements
---

Yaku (役) is a scoring pattern your hand must contain before you can win in riichi mahjong. Without at least one yaku, you cannot declare a win, even if your tiles form a complete hand. Every yaku is worth a specific number of han points, and your final score is calculated from the sum of all yaku in your winning hand.

The yaku rule exists in Japanese riichi mahjong, Chinese Official mahjong, and most competitive variants. American mahjong (NMJL) uses a different system based on the annual NMJL card, where every legal hand pattern counts as a winning configuration without needing separate yaku.

This guide focuses on riichi yaku — what they are, why the rule exists, how many there are, and which yaku beginners should learn first.

## What Does Yaku Mean in Japanese Mahjong?

The word yaku translates roughly as "role" or "scoring element." In riichi mahjong, a yaku is a specific tile pattern or game condition that gives your hand its value. Common examples include reaching tenpai with a closed hand and declaring riichi, or finishing with all simple tiles 2 through 8.

Each yaku is worth a number of han, which feeds into the scoring formula. A 1-han yaku is the minimum required to win. Hands with multiple yaku stack their han values, and a hand worth 13 or more han is called a yakuman — the highest scoring tier in the game.

The concept comes from older Chinese mahjong scoring systems but became formalized in Japanese rules during the early 1900s. The yaku list as you see it today was largely standardized by the Japan Mahjong League in the postwar era.

## Why Do Mahjong Hands Need Yaku?

The yaku requirement exists to encourage strategic play instead of rushing to complete any random hand. If any 14-tile valid hand could win, players would just collect tiles as fast as possible without thinking about hand value, defense, or shape. Yaku force you to commit to a direction.

Strategically, the rule has three effects:

- **It rewards skill.** Building a hand with yaku means thinking ahead about which tiles to keep and which to discard.
- **It creates risk-reward decisions.** Some yaku (like a closed hand for riichi) require you to play more cautiously and skip helpful calls.
- **It gives mahjong its scoring depth.** The 40-plus yaku create endless hand-building paths instead of one optimal strategy.

This is why riichi feels deeper than simpler mahjong variants. You're not just collecting tiles. You're shaping a story.

## How Many Yaku Exist in Riichi Mahjong?

Standard riichi mahjong recognizes 40 to 43 yaku depending on the rule set. They're commonly grouped into four categories:

| Category | Examples | Han Value |
|---|---|---|
| Common 1-han yaku | Riichi, pinfu, tanyao, yakuhai | 1 han |
| 2-han yaku | Toitoi, chiitoitsu, sanshoku doujun | 2 han |
| 3-han and 6-han yaku | Honitsu, junchan, ryanpeikou | 3-6 han |
| Yakuman (13+ han) | Kokushi musou, suuankou, daisangen | 13 han or more |

The complete reference list is on the [mahjong yaku list](/blog/mahjong-yaku-list-for-beginners-essential-guide/), which includes han values, examples, and difficulty ratings for every yaku in the standard set.

A few yaku are closed-hand only — meaning you cannot have made any open calls (chi, pon, or open kan) during the hand. Riichi and pinfu are the most famous examples. Other yaku work either open or closed, just at reduced han value when open.

## Which Yaku Should Beginners Focus on First?

Five yaku will cover most of your wins as a new riichi player:

**1. Riichi (1 han) — Closed hand only.** Declared when you reach tenpai with a closed hand. Costs 1,000 points but adds a guaranteed han. The bread and butter of beginner riichi.

**2. Tanyao (1 han) — All simples.** Your hand contains no terminals (1s, 9s) and no honor tiles (winds, dragons). Easy to recognize and easy to build toward.

**3. Pinfu (1 han) — Closed hand only.** A "peaceful hand" with all sequences, a non-value pair, and a two-sided wait. Pinfu often combines with riichi for 2 han plus a ippatsu chance.

**4. Yakuhai (1 han per set).** A triplet of dragons or your seat or round wind. Counts as a yaku each. Easy because winds and dragons appear in every hand. Read the [complete yakuhai guide](/blog/yakuhai-complete-guide-value-tiles/) for which winds count.

**5. Iipeikou (1 han) — Closed hand only.** Two identical sequences in the same suit (for example 234m + 234m). Less common but rewards careful tile retention.

Once these five feel natural, expand into 2-han yaku like toitoi (all triplets) and chiitoitsu (seven pairs).

## What Happens if You Finish a Hand Without Yaku?

If your 14 tiles form a complete hand but contain no yaku, you cannot declare a win. This situation is called yaku-nashi or "no yaku," and it's one of the most painful beginner mistakes. The official term in Japanese is yaku-nashi agari, and most rule sets treat it the same as not winning at all.

The fix is to plan your yaku before you reach tenpai, not after. If you're 1 tile away from completing a hand and you cannot identify a yaku in it, change course. Discard a tile that breaks your shape and rebuild toward a yaku-bearing hand. For a deeper walkthrough, see [what happens when you have no yaku](/blog/no-yaku-mahjong-yaku-nashi-explained/).

## Frequently Asked Questions

**Is yaku required in American mahjong?**
No. American mahjong (NMJL) uses a different system based on the annual NMJL card. Each printed hand pattern is a complete winning condition on its own, so there's no separate yaku layer to satisfy.

**Can a hand have multiple yaku at once?**
Yes — and you generally want this. Each yaku adds han, which multiplies your final score. A common stacked example: riichi (1) + pinfu (1) + tanyao (1) for 3 han total. Most strong hands combine 2 or 3 yaku.

**Does dora count as yaku?**
No. Dora (and aka dora red fives) add han to your score but are not yaku on their own. You still need at least one real yaku to win, and then dora multiplies the final value.

**What's the easiest yaku to win with as a beginner?**
Riichi. Reach tenpai with a closed hand, declare riichi, deposit 1,000 points, and wait for your tile. It's the most reliable beginner yaku because it doesn't require any specific tile pattern.

**Why does my hand sometimes get rejected even though it looks complete?**
Almost always because it has no yaku. Online platforms like Mahjong Soul and Tenhou will not let you call tsumo or ron unless your hand contains at least one valid yaku. Check your hand structure: are you missing riichi, tanyao, yakuhai, or pinfu requirements?

**Is the yaku list the same on Mahjong Soul and Tenhou?**
Mostly yes. Both platforms follow standard Japanese riichi rules. Mahjong Soul has a few rare optional yaku (like renhou) that some platforms don't credit, but the core 40-plus yaku are identical. The [Mahjong Soul yaku cheat sheet](/blog/mahjong-soul-yaku-cheat-sheet/) breaks down the platform-specific differences.

## Where to Go Next

Keep building your foundation with the [complete mahjong yaku list](/blog/mahjong-yaku-list-for-beginners-essential-guide/) for all 43 yaku in one reference. If you'd rather have a printable version next to your tiles, grab the [free yaku cheat sheet PDF](/resources/yaku-cheat-sheet/). And for the most common beginner trap, read [what to do when you have no yaku](/blog/no-yaku-mahjong-yaku-nashi-explained/) before your next session.
---

*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/blog/what-is-yaku-mahjong-beginners-guide/.*