Suushiihou

Both shousuushi (小四喜) and daisuushi (大四喜) are standard yakuman. Both involve the kazehai (wind tiles).

Tile diagram

The difference between the two yakuman forms are subtle. Shousuushi only need a complete group of three out of the four wind types, while pairing up the fourth type. On the other hand, daisuushi requires a complete group for all four wind types.

Shousuushi

Agari: or

Daisuushi

Agari: .

Note: This would be shousuushi if agari on