Riichi Mahjong · 1 han（closed only）
Menzen Tsumo (Fully Concealed Hand) in Riichi Mahjong: Han, Fu and Scoring
In riichi mahjong, Menzen tsumo (fully concealed hand, usually just called "tsumo") is worth 1 han: your hand is closed (no chi, pon or open kan) and you draw the winning tile yourself. No declaration and no other condition, so a closed hand always has a yaku when it wins by tsumo.
On this page
The rules for Menzen Tsumo
- Closed hand: no chi, pon or open kan (a closed kan is fine)
- You draw the winning tile yourself: a normal draw, a replacement tile after a kan, or the last tile of the wall
- With or without riichi; even with no other yaku, a closed hand can win by tsumo
- Once you've called, it's gone — an open hand needs another yaku to win by tsumo
Tsumo fu and payments
- A tsumo adds 2 fu — except pinfu tsumo, which is always 20 fu (you get both pinfu and menzen tsumo)
- Chiitoitsu is always 25 fu, tsumo or not
- Non-dealer tsumo: the dealer pays half, the other two non-dealers a quarter each
- Dealer tsumo: all three pay the same ("all")
How Menzen Tsumo is scored
The yaku, han, fu and points below are computed live by the same scoring code the game uses.
Tsumo
| Menzen tsumo | 1 han |
| Total | 1 han 30 fu · 300 / 500 points |
|---|
Non-dealer, East round, no dora, no honba.
Tsumo
| Menzen tsumo | 1 han |
| Pinfu | 1 han |
| Total | 2 han 20 fu · 400 / 700 points |
|---|
Non-dealer, East round, no dora, no honba.
Tsumo
| Tanyao | 1 han |
| Total | 1 han 30 fu · 300 / 500 points |
|---|
Non-dealer, East round, no dora, no honba.
Common combinations:
| Combination | Han |
|---|---|
| Menzen tsumo | 1 |
| Tsumo + pinfu | 2 |
| Tsumo + riichi | 2 |
| Tsumo + riichi + pinfu | 3 |
| Tsumo + riichi + ippatsu | 3 |
Tsumo odds
We let four computers at normal level play 40,000 hands on this site's table:
- 37% of all wins were by tsumo; 54% of all wins came from open hands.
- Menzen tsumo was in 22% of wins, averaging 9,200 points; among riichi wins, 47% were by tsumo.
Self-draw in other mahjong styles
- Sichuan mahjong: by default every payer adds one unit; a rule option makes it 1 fan (Sichuan mahjong Self-Draw)
- Taiwanese mahjong: self-draw 1 tai, concealed hand 1 tai, both together 3 tai (Taiwanese mahjong scoring)
- Hong Kong mahjong: self-draw 1 fan (Hong Kong mahjong fan table)
- Chinese Official (Guobiao): self-drawn 1 fan; concealed and self-drawn is "Fully Concealed Hand", 4 fan (Guobiao fan list)
To practice, open a table of free online riichi mahjong — the computers play with you and count the points for you.
FAQ
How many han is Menzen Tsumo?
1 han, closed only. No declaration needed — a closed hand that wins by tsumo gets it.
Does an open hand get a yaku for tsumo?
Not menzen tsumo. An open hand needs another yaku such as tanyao or yakuhai. Haitei and rinshan kaihou, though, don't require a closed hand.
Why is pinfu tsumo 20 fu?
Pinfu is the "no fu" hand, so by rule the 2 tsumo fu aren't added and it's scored at 20 fu — with both pinfu and menzen tsumo as yaku.
Related yaku
Riichi 1 han（closed only）
Declare it with a closed tenpai hand for 1 han: requirements, the rules after riichi, ippatsu and ura dora, win rate and average result.
Pinfu 1 han（closed only）
Four sequences, a non-value pair and a two-sided wait — closed only, 1 han. Waits, 20 vs 30 fu, common combos.
Haitei Closed 1 / open 1
Win by tsumo on the last tile of the wall — 1 han, open or closed. Rules, how the last tile moves, scoring and odds.
Try it at the table
Riichi Mahjong — Play Japanese Riichi Mahjong free in your browser against three AI opponents. Standard online rules with red fives, ippatsu and ura dora, a yaku guide, wait and furiten hints, and three AI levels. No sign-up.