I own a bootleg copy of MBTS
Seen a few bits of it but have yet to see all of it..seems pretty f'ed up
I got pretty interested in the whole history of that and done research and also own Philosophy of a Knife which is like a 4 hour exploitation movie. Not sure if its as bad as MBTS as all the gore is in black and white but it also includes interviews and stuff so feels more like a documentary. Not seen it all yet either.
Also the guinea pig series..mainly flower of flesh and blood...
The effects were pretty awesome for a low budget Japanese flick in those days..its a pretty nasty movie..IMO in the top 3 gory movies I seen.