Shit Tanaka has been through as a labrat:

- shot in the head, point-blank (ch 1)
- crushed (ch 2)
- stakes(?) driven through his body, testing involving electrodes(?), eyes removed (?) (ch 3)
- vocal cords cut (presumably, as with Kei) (ch 7)
- used as living crash test dummy, drug testing subject (ch 14)
- used for prototype bulletproof vest testing (ch 34)