Question about recent NJPW

So I watched WK20 (first NJPW show since the last one with Kenny and Okada) and saw the death pain invitational announced for Vegas and was caught so off guard lol because I think it used to be a Freedoms or BJW thing. I remember NJPW starting to embrace weapons and street fighting more around when Jericho debuted but nothing even close to full on death match. I'm just curious as to when they embraced death match/hardcore matches, and what are some good ones I should check out. (NJPW only, seen a lot of freedoms and BJW)

by Fthatoutlawmudshow97