"Mottainai" means "Don't waste", or "Every little thing has a soul".
In the game Mottainai, related to the Glory to Rome game, you use your cards for multiple purposes. Each player is a monk in a temple who performs tasks, collects materials, and sells or completes works for visitors for currency. Every card can be used for each of these three actions. You choose tasks to allow you to perform actions, keeping in mind that other players will get to follow up on your task on their next turn. Clever forward planning and combining of your works' special abilities is key, as is managing which materials you sell.
Mottainai is a in depth, but quick, experience.
If you a more compact version of Mottainai for 2 - 3 players, why not check out Mottainai Mini!
Don't just take our word for it! Check out this review of Mottainai Deluxe.