Ikkitsuukan
| Type | Yaku |
|---|---|
| Kanji | 一通 or 一気通貫 |
| English | Straight |
| Value |
2 han 1 han (open) |
| Speed | Fast |
| Difficulty | Easy |
Ikkitsuukan 「一気通貫」, or Ittsu 「一通」 for short, is one of the standard yaku. This hand consists of three melds in one suit of 1 through 9, any available extra meld, and any pair. This hand may be open or closed.
Tile diagram
Winning tile: 
or 
Open
Winning tile:
Formation
While the hand shows a complete 1-9 grouping from a particular suit, it is best to view as three separate groups of: 123, 456, and 789. This is particularly useful to note when needing to open the hand with such a combination.
Counter example
Waiting for: or 
In this counter example, the tiles 1-9 for one suit are in the hand. However, ittsu would not be counted. In fact, this hand is lacks any yaku. The manzu are not grouped as 123, 456, and 789. Instead, they are grouped as 123, 567, and 789. The 4-man function as the pair rather than belong to any of the sequences.
Compatability
^ Ippatsu requires riichi to be of any use.
| RCH | DRI | IPP^ | SMO | TAN | PFU | IPK | ITT | YAK | SDJ | SDO | TOI | SNA | SNK | CHA | JUN | RPK | SSG | HRO | HON | CHN | CHI | RIN | HAI | HOU | CHK | |
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External links
- Ikkitsuukan in Japanese Wikipedia
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