For example, if you have 2 Strawberry Daifuku - Golden, 2 Salmon Sushi - Golden, 2 King Crab - Golden, and 2 White Caviar - Golden, the bonus buff for the Japanese Cuisine family will be 5% + 10% + 20% + 50% + 30% (family bonus) = 115%, and bonus buff for the other families will be 85%.