Ninjas used manbags?

Dressed as a Ninja, stalking across London last night, I realised some of the more practical issues Ninjas must have to face. First of all, whilst a Ninja may not have keys or a mobile phone (they would never enter a building via a door and communicate via advanced telepathy), the costumes have no obvious place for storing Shuriken. Ninjas have NO POCKETS.

So do they use Manbags? Another question for Ask a Ninja, methinks…