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Yakuza (Oya-ken)

Tournament scoring plus Dealer's Privilege. Card scoring is exactly the same as Tournament. The only addition is that a round that ends with no winner pays the dealer.

Summary

  • Scoring is identical to Tournament: Viewings are disabled, and the Sake Cup is an animal.
  • Dealer's Privilege: when a round ends in a draw, the current dealer wins and receives 6 points.
  • A round is a draw in two cases: exhaustion (both hands empty, nobody called Shobu), and both players lucky.
  • The dealer keeps the deal after a Dealer's Privilege round.
  • One Koi-Koi call per player per round, then a forced Shobu, as in Nintendo and Tournament.

The two Viewings that score nothing under Yakuza (and Tournament) — Curtain + Sake Cup and Moon + Sake Cup:

03-B Curtain 08-B Moon 09-A Sake Cup

Curtain (March), Moon (August), Sake Cup (September).

Dealer's Privilege in detail

Situation Normal rule sets Yakuza
Exhaustion (no winner) 0–0 draw, dealer stays Dealer wins 6 points, dealer stays
Both players lucky 0–0 draw Dealer wins 6 points
One player lucky That player wins 6 That player wins 6 (unchanged)

Dealer's Privilege is a flat 6 points. It is not multiplied by Koi-Koi calls or the 7+ rule.

This is a documented rule, not an invention: the traditional Oya-ken (親権, "Dealer's Privilege", also oya gachi). Japanese Koi-Koi guides pay the dealer exactly 6 points when both hands empty with no yaku, and list it beside the lucky hands as a flat rule:

「どちらも『勝負』をせず、札がなくなって流れた場合は『親権』として親に6点が入ります」 — rinchar

"Oya-Ken (Dealer's Privilege) — If neither gets any Yaku, Dealer wins 6 points." — gamedesign.jp

The same lists carry its mirror, Tsukazu (6 points to the non-dealer instead). Two places where Yakuza goes further than the sources: traditional Oya-ken covers the exhaustion draw only — extending it to the both-lucky draw is this rule set's choice — and a few sources pay the dealer 1 point rather than 6.

Why the dealer matters

Because a draw pays the dealer and the dealer keeps the deal, being the dealer is worth more on Yakuza than on the other rule sets. A dealer can collect 6 points from a draw and still be dealer for the next round.

DEUS SUPREMUS

The final CPU opponent, Entity 13 // DEUS SUPREMUS, always plays under Yakuza rules. The ruleset selector is locked for that difficulty. See Difficulty.

Ruleset Source