I seen Ichi The Killer in a wee poky cinema in Glasgow years ago. It was the uncut edition as well. Love some of Takashi Mike gear.
I preferred Ferox to Holocaust in all honesty. Was more cheesy and had the dude from House At The Edge Of The Park in it which, incidentally, was directed by the same guy who done Holocaust (Deadato?)
Will scope out your other suggestions old chap!