What is Tonba?
Tonba is the point addition from honba (counter sticks) during consecutive deals or draws. When the dealer continues (renchan) or draws occur, counter sticks accumulate, adding 300 points × honba count to winning hands.
Officially called “honba,” the term “tonba” (from “East round” pronunciation) became common slang. Higher honba counts significantly affect scoring.
Honba Conditions
| Condition | Honba Change | Example |
|---|---|---|
| Dealer renchan | +1 honba | Dealer wins by tsumo |
| Dealer draw | +1 honba | Dealer tenpai at draw |
| All draw | +1 honba | Everyone tenpai/noten |
Point Addition
| Win Type | Addition | Example (2 honba) |
|---|---|---|
| Tsumo | 100 pts from each | +100 from each player |
| Ron | 300 pts from dealer-in | Base + 600 pts |
※1 honba = 300 point addition
Common Usage
Example 1: Checking honba
"2 honba so +600 points"
"Tonba is stacking up"
Example 2: Renchan
"Dealer's 3rd renchan, 3 honba"
"Honba is piling up"
Example 3: Scoring
"8000 plus 2 honba = 8600"
"Mangan with honba bonus"
Related Terms
- Renchan: Dealer continues
- Ryuukyoku: Exhaustive draw
- Oya: Dealer
- Kyoutaku: Riichi stick deposits
- Tenpai: Ready to win
Common Mistakes
-
Wrong addition amount
- 1 honba = 300 pts
- 100 pts × 3 players
-
Tsumo vs Ron difference
- Tsumo: split among all
- Ron: from dealer-in only
-
Reset timing
- Non-dealer wins = 0 honba
- Dealer rotates = 0 honba
-
Confusion with kyoutaku
- Tonba: honba points
- Kyoutaku: riichi sticks (1000 pts)
Calculation Examples
Tsumo Win
Non-dealer tsumo (2000 pts, 2 honba):
Base: 2000 from dealer, 1000×2 from non-dealers
Honba: 100 pts from each
Total:
Dealer: 2000+100 = 2100 pts
Non-dealer: 1000+100 = 1100 pts × 2
Total received: 4400 pts
Ron Win
Non-dealer ron (8000 pts, 3 honba):
Base: 8000 pts
Honba: 300 × 3 = 900 pts
Total: 8900 pts
Strategic Meaning
High Honba Decisions
| Situation | Tactic | Reason |
|---|---|---|
| As dealer | Attack aggressively | Renchan adds honba |
| As non-dealer | Aim to win | Reset honba |
| Big deficit | Attack | Comeback chance |
| Top position | End honba | Reset and defend |
Dealer Strategy
Dealer renchan
↓
Honba increases
↓
Next win = high points
↓
Advantageous position
Point Examples
Various Cases
| Base Points | Honba | Addition | Total |
|---|---|---|---|
| 1000 pts | 0 | 0 | 1000 pts |
| 1000 pts | 2 | 600 | 1600 pts |
| 3900 pts | 3 | 900 | 4800 pts |
| 8000 pts | 5 | 1500 | 9500 pts |
| 12000 pts | 10 | 3000 | 15000 pts |
High Honba Impact
At 10 honba:
Cheap hand:
1000 pts → 4000 pts (4×)
Mangan:
8000 pts → 11000 pts (1.4×)
Dealer baiman:
24000 pts → 27000 pts
Honba Reset Conditions
When It Resets
-
Non-dealer wins
- Dealer rotates
- Honba resets
-
Dealer rotates
- Dealer noten at draw
- Next hand begins
-
Round changes
- East to South
- Always resets
When It Continues
- Dealer wins (renchan)
- Dealer tenpai at draw
- All tenpai draw
- All noten draw
Recording Honba
Physical Display
Place counter sticks by dealer
1 honba: 1 stick
2 honba: 2 sticks
5 honba: 5 sticks
Online Mahjong
- “X honba” number display
- Auto-calculated
- Clearly visible
Honba Plus Kyoutaku
When Both Exist
Base points: 3900
Honba: 3 (900 pts)
Kyoutaku: 2 riichi sticks (2000 pts)
Total: 3900 + 900 + 2000 = 6800 pts
Calculation Order
- Calculate base points
- Add honba
- Add kyoutaku
- Pay total
Summary
Tonba/Honba is the point addition from counter sticks - 300 points per honba count added to winning hands. Tsumo wins get 100 from each player; ron wins get 300×honba from the dealer-in. Beginners should learn “1 honba = +300 points” and not forget to add it when winning. High honba significantly affects point totals, making dealer renchan strategy and non-dealer honba-breaking important tactical considerations.