There's a playable demo up on the Japanese PSN store.
It's a puzzle game based on sequentially controlling a set of ninjas, all for the same 60 second time period. You play alongside replays of all the previous ninjas, such that ultimately all of your ninjas will act simultaneously to solve the level and reach the exit.
The ninjas do not collide with/affect each other, but do affect everything else. So you can leave the first ninja on a pressure plate for all 60 seconds, and it will then stay pressed when you're playing subsequent ninjas.
It's very similar to the flash game Cursor*10, which will probably make things clearer than my description.
http://www.nekogames.jp/mt/2008/01/cursor10.html
There's also a copy of the gameplay video here:
http://www.youtube.com/watch?v=GiNIoN9jfzU as the direct link doesn't seem to work