Editing Japanese mahjong scoring rules (section)

====Fu of waits====
The list for the fourth step:
{| class="wikitable" border="1"
|-
|width="30%"|'''Type'''
|width="50%"|'''Description'''
|width="20%"|'''''fu'''''
|-
|''ryanmen-machi'' (両門待ち)
|the wait for either side of two simple tiles (e.g. 1 or 4 for 23; similarly, 34/45/56/67/78) made into a ''shuntsu''
|0 ''fu''
|-
|''kanchan-machi'' (嵌張待ち)
|the wait for the middle of two simple tiles (e.g. 2 for 13; similarly, 24/35/46/57/68/79) made into a ''shuntsu''
| rowspan="3" | 2 ''fu''<br>(waiting for one kind of tile)
|-
|''penchan-machi'' (辺張待ち)
|the wait for the inner side of outermost two simple tiles (i.e. 3 for 12 or 7 for 89) made into a ''shuntsu''
|-
|''tanki-machi'' (単騎待ち)
|the wait for another single tile (e.g. 1 for single 1, East for single East) made into a ''toitsu''
|-
|''shanpon-machi'' (双碰待ち)
|the wait for either tile in two ''toitsu'' (e.g. 1 or 2 for 1122) made into a ''kōtsu'' || 0 ''fu''<br>(''fu'' of '''wait''' is 0 ''fu'' itself, however, ''fu'' of '''melds''' (2, 4 or 8 ''fu'') for the new ''kōtsu'' is still valid.)
|-
|}