| Japanese Riichi | Overview | Gameplay | Scoring |
|---|
A minimum of one Yaku is needed to have a valid hand. A player cannot call "Ron" on a discard if they are in Furiten.
After a player says "Tsumo"/"Ron" (and it's confirmed they have a valid winning hand) their Han & Fu are totaled and converted into points. Then they receive a payout.
Converting Han & Fu to Points
Upon scoring, if you have a hand worth less than five Han you must add up any Fu and follow the values based on the charts below. The Fu are then rounded up to the nearest multiple of 10. If you have five or more Han you do not add up any Fu, but instead use the Limit chart below.
Calculating Fu
| Fu for sets | Exposed | Concealed |
|---|---|---|
| Pung of simples | 2 | 4 |
| Pung of terminals/honors | 4 | 8 |
| Kong of simples | 8 | 16 |
| Kong of terminals/honors | 16 | 32 |
| Fu for Winning | Fu |
|---|---|
| Pair of Dragons | 2 |
| Pair of seat/prevalent wind | 2 |
| Edge, closed, single wait | 2 |
| Self-draw (not in case of pinfu) | 2 |
| Open pinfu | 2 |
| Concealed hand | 30 |
| Seven pairs (no futher minipoints) | 25 |
| Open hand and/or self-drawn | 20 |
Calculating Han
Han can be earned from Yaku, Dora, Ura Dora, Kan Dora, Kan Ura Dora, and Aka Dora.
Each Dora found in the hand is worth +1 Han.
Some Yaku are worth differing amounts of Han based on if the hand was Open or Closed.
Scoring Table
A Han value of M = Mangan; A Han value of Y = Yakuman.
| Name | Japanese | Kanji | Han (Closed) | Han (Open) | |
|---|---|---|---|---|---|
| Riichi | Riichi | 立直 | 1 | ||
| Ippatsu | Ippatsu | 一発 | 1 | + 1 han for Riichi. | |
| Double Riichi | Daburu riichi | ダブル立直 | 1 | + 1 han for Riichi | |
| Fully Concealed Hand | Menzen tsumo | 門前清自摸 | 1 | ||
| Pinfu | Pinfu | 平和 | 1 | ||
| Pure Double Chow | Ii peikō | 一盃口 | 1 | ||
| All Simples | Tanyao chū | 断么九 | 1 | 1 | |
| Yakuhai | Yakuhai | 役牌 | 1 | 1 | |
| Robbing a Kong | Chan kan | 搶槓 | 1 | 1 | |
| After a Kong | Rinshan kaihō | 嶺上開花 | 1 | 1 | |
| Last tile Draw | Haitei | 海底摸月 | 1 | 1 | |
| Last tile Claim | Hōtei | 川底撈魚 | 1 | 1 | |
| Seven Pairs | Chii toitsu | 七対子 | 2 | Seven different pairs | |
| Pure Straight | Ikkitsukan / Ittsu | 一気通貫 | 2 | 1 | |
| Mixed Triple Chow | San shoku dōjun | 三色同順 | 2 | 1 | |
| Outside Hand | Chanta | 全帯ヤオ | 2 | 1 | |
| All Pungs | Toitoi hō | 対々和 | 2 | 2 | |
| Mixed Triple Pung | San shoku dōkō | 三色同刻 | 2 | 2 | |
| Three Concealed Pungs | San ankō | 三暗刻 | 2 | 2 | |
| Three Kongs | San kantsu | 三槓子 | 2 | 2 | |
| All Terminals & Honors | Honrōtō | 混老頭 | 2 | 2 | +2 Han for All Pungs or Seven Pairs |
| Little Three Dragons | Shōsangen | 小三元 | 2 | 2 | +2 Han for the 2 Yakuhai |
| Double-Double | Ryan peikō | 二盃口 | 3 | ||
| Half Flush | Honitsu | 混一色 | 3 | 2 | |
| All Terminal Melds | Junchan | 純全帯 | 3 | 2 | |
| Blessing of Man | Renhō | 人和 | M | Not cumulative. | |
| Full Flush | Chinitsu | 清一色 | 6 | 5 | |
| Blessing of Heaven | Tenhō | 天和 | Y | ||
| Blessing of Earth | Chihō | 地和 | Y | ||
| Thirteen Orphans | Kokushi musō | 国士無双 | Y | ||
| Nine Gates | Chūren pōto | 九蓮宝燈 | Y | ||
| Four Concealed Pungs | Sū ankō | 四暗刻 | Y | ||
| Four Kongs | Sū kantsu | 四槓子 | Y | Y | |
| All Green | Ryū iisō | 緑一色 | Y | Y | |
| All Terminals | Chinrōtō | 清老頭 | Y | Y | |
| All Honors | Tsū iisō | 字一色 | Y | Y | |
| Big Three Dragons | Daisangen | 大三元 | Y | Y | |
| Little Four Winds | Shōsūshi | 小四喜 | Y | Y | |
| Big Four Winds | Daisūshi | 大四喜 | Y | Y |
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