Tokyo rules

Tokyo rules 「東京ルール」or all iihan shibari mahjong 「全一飜縛り麻雀」 is a 1957 ruleset created by Amano Daizo.

Equipment and setup

All tenbou have tenth of their usual value. Special 5000 point sticks are used.

All players start with 20000 points:

• One 5000 point stick
• Nine 1000 point sticks
• Ten 500 point sticks
• Nine 100 point sticks
• Ten 10 point sticks

Play

The game is played as tonpuusen. Two dice rolls are used during the deal.

Calling and riichi

Kuikae is allowed.

A riichi bet is 100 points. You cannot call ankan during riichi.

Winning and furiten

Furiten only affects discarded/skipped tiles, and the tiles connected to them by ryanmen; other waits can be ronned.

In the case of double ron:

• One person is paid in full according to atamahane; the other is paid half.
• Winner get their riichi bets back; other riichi sticks are given according to atamahane.

Ryuukyoku

There are no noten payments. An exhaustive draw always results in renchan. There is no honba.

The following abortive draws are enabled:

• Kyuushu kyuuhai
• Suufon renda
• Suukaikan
• Suucha riichi
• Sanchahou

Sekinin barai

Sekinin barai applies to the following hands:

• Daisangen
• Daisuushii
• Suukantsu
• Tsuuiisou with 4 calls and tsumo
• Chinroutou with 4 calls and tsumo

Scoring

Fu

Fu functions normally, except open pinfu is 20 fu.

Han

There is no kandora or uradora.

A special rule of zoroba 「ゾロ場」 is used:

• Each 1 or 6 rolled during the deal adds 1 han to the winning hand.
• Each sum of 7 also adds 1 han to the winning hand.
• If neither of the conditions are met, the dice are rolled again until at least 1 han is added. Each reroll adds 300 points to the winning hand, similar to honba.
• Zoroba does not count towards the 1 han minimum.

Scoring tables

Non-dealer scoring table

Han/Fu	20	25	30	40	50	60	70	80
2	320 (80/160)	-- --	480 (120/240)	640 (160/320)	800 (200/400)	960 (240/480)	1120 (280/560)	1280 (320/640)
3	640 (160/320)	800 (200/400)	960 (240/480)	1280 (320/640)	1600 (400/800)	1920 (480/960)	2240 (560/1120)	2560 (640/1280)
4	1280 (320/640)	1600 (400/800)	1920 (480/960)	2560 (640/1280)	3200 (800/1600)	3840 (960/1920)	4000 (1000/2000)
5	2560 (640/1280)	3200 (800/1600)	3840 (960/1920)	4000 (1000/2000)
6	4000 (1000/2000)
Shoumangan	6000 (1500/3000)
7+ (8+ with dora)	8000 (2000/4000)
Daimangan	12000 (3000/6000)

Dealer scoring table

Han/Fu	20	25	30	40	50	60	70	80
2	480 (160)	-- --	720 (240)	960 (320)	1200 (400)	1440 (480)	1680 (560)	1920 (640)
3	960 (320)	1200 (400)	1440 (480)	1920 (640)	2400 (800)	2880 (960)	3360 (1120)	3840 (1280)
4	1920 (640)	2400 (800)	2880 (960)	3840 (1280)	4800 (1600)	5760 (1920)	6000 (2000)
5	3840 (1280)	4800 (1600)	5760 (1920)	6000 (2000)
6	6000 (2000)
Shoumangan	9000 (3000)
7+ (8+ with dora)	12000 (4000)
Daimangan	18000 (6000)

Yaku

1 han yaku

• Tanyao
• Yakuhai
• Iipeikou
• Pinfu
• Riichi
• Menzen tsumo
• Haitei/Houtei
• Rinshan
• Chankan
• Shiiaru raotai
• Ketsupaihou

2 han yaku

• Honitsu
• Shousangen
• Sanshoku ittsuu
• Chiitoitsu
• Sanankou
• Sankantsu
• Toitoi
• Daburu riichi

3 han yaku

• Ittsuu, 2 han if open
• Sanshoku doujun, 2 han if open
• Chanta, 2 han if open
• Sanrenkou
• Choupaikou/Sujipaikou/Chousankou
• Otakaze sankou
• Sanshoku doukou
• Renkaihou
• Shiisanpuutaa

4 han yaku

• Isshoku sanjun, 3 han if open
• Junchan, 3 han if open
• Uushin tsuukan
• Ryuuiisou, probably only 2 han + 2 han from honitsu
• Ryanpeikou
• Ryandoukou, probably only 2 han + 2 han from toitoi
• Iipin mouyue
• Uupin kaihou
• Ryansou chankan
• Chinchii toushii

Shoumangan

• Isshoku yonjun
• Rentsuu honitsu
• Chinitsu
• Honroutou
• Dorahairi chinroutou chiitoitsu
• Daichiishin
• Renhou, win during the first go-around

Daimangan

• Chinroutou
• Daisangen
• Suushiihou
• Tsuuiisou, excluding daichiishin
• Suuankou
• Suukantsu
• Tenhou
• Chiihou, win from the dealers fist discard
• Kokushi musou
• Chuuren poutou, scored as 16000/24000 points

References

• Suzuki Susumu & Amano Daizo. リーチ・どら麻雀の打ち方. Kin'ensha: 1957.