Honroutou

Honroutou
Type	Yaku
Kanji	混老頭
English	Terminals and honors
Value	2 han (consider as 4 han)
Speed	Slow
Difficulty	Hard

Honroutou 「混老頭」 is a yaku scored when every tile in the hand is either a terminal or an honor tile. The hand must contain at least one honor and one terminal to score honroutou; an all honor hand would be tsuuiisou, while an all terminal hand would be chinroutou.

Tile pattern

Agari: or

Formation

Because every tile must be a terminal or honor, sequences are not allowed, since a sequence always contains non-terminal tiles. Naturally, a large amount of honors/terminals are required to even consider this yaku. A majority of honroutou hands are open, using pon to complete a triplet-based hand.

Compatibility

Main article: Yaku compatibility

^ 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
HRO

Honroutou is not compatible with any yaku which require a sequence, which accounts for most of the incompatibilities (including chankan, which must always win on a sequence wait). Tanyao is incompatible because it requires no terminals or honours, and honroutou requires only those tiles. Chanta is incompatible because it is implied by honroutou. Finally, if honroutou is combined with junchan, the entire hand must be terminals, which gives the chinroutou yakuman.

Value

It is impossible to score this yaku without at least either toitoi or chiitoitsu. Therefore, every hand that scores honroutou is worth at least 4 han.

In toitoi form, honroutou is always worth a mangan at minimum. The lowest scoring hand would have 36 fu (20 fu for winning; 4 open terminal triplets, worth 4 fu each), which is then rounded up to 40 fu. A 4 han 40 fu hand scores mangan. Such a hand is shown below: