>>20
It's just at the top of the chain after you climb up, but I figured out when you start off the game at first, you have to click "ゆとりモード" instead of "START" or the save button won't appear. I'm not sure what "Yutori Mode" means but I'm assuming it's some kind of debug option or something.

The text on the pipe translates to "Demolishing Processor."