The Throwing Stars are one of the famous tools of a ninja, equip Throwing Stars at the lower left of your game screen and then tap the spacebar to throw then in the direction of the cursor. Throwing Stars are best used for stealth, not combat.
How to Get the Throwing Stars
Because you have a heart that wants to help and not expecting to receive anything in return. Basho finds you to be fit in his training and he will provide you training to be a great ninja and all the tools you need to rescue your friends, including Throwing Stars.