Feel free to use any or all of these optional rules:
Change the direction of play when you begin each new round.
Wild Cards and/or Sushi Cards with wasabi on them count as only half a card when awarding Scoring Chips.
You can also identify the wasabi by the dots on the card.
When determining which player earns the dessert Scoring Chip, if one (or more) of a player's Sushi Cards has wasabi on it, then that player counts that type of sushi as only a half-a-type of sushi instead of one.
It is more difficult to earn dessert if you eat sushi with wasabi.
Pass and score the sixth sushi card each round (instead of discarding it).
Each Scoring Chip only counts as 1 point. (The values written on the bottom are ignored).