Karate Survivor in Another World (Manga) Vol. 6

"I think this one definitely fits into the column of "Isekai to check out if you think you're sick of isekai", as it bucks enough of the expected conventions and passes the test of simply being an interesting story in its own right, regardless of genre genesis. But I'd also say that more dyed-in-the-wool isekai fans might have a good time with this one as well, given its aforementioned propensity for not talking down to said genre conventions." --Christopher Farris, Anime News Network