Kikka means flower of Crysanthemum.
Sai means dice.
So Kikkasai is a Crysathemum dice game.
The game takes place in the Finals of a Flower show competition for prize Chrysanthemum.
You aim for the victory by completing your set of 3 Chrysanthemum dice.
Each players start from 0 point, and you win by get your points to 6 or over.