Riichi Mahjong Yaku
Fully Outside Hand
Also known as: Junchan · Pure Outside Hand · 純全帯么九
Every group and the pair contains a terminal, with at least one sequence and no honors.
Yaku value
Closed hand
3 Han
Open hand
2 Han
Requirements
Each meld and the pair must contain a 1 or 9. The hand must include a sequence and cannot contain honor tiles.
Common scoring mistake
Adding an honor changes the pattern to Half Outside Hand. Opening the hand reduces the value from 3 Han to 2 Han.
Values follow common modern Riichi rules. Local and tournament rules may differ, especially for double Yakuman.