I googled the review of the anime and got this 
[quote]Black Lion is bad anime: Preposterous, gory, and ugly to
boot. The story consists of excuses for why there are tanks and
cyborg samurai running around the Edo period and watching the main
characters' repeated attempts to destroy the immortal Jinnai using
the brilliant strategy "If killing him didn't work this time, we've
got to kill him harder next time!" Its biggest draw past the utter
wrongness of the premise is the never-ending shower of messy chunks
that Jinnai reduces pretty much everybody he comes across to.
Fortunately, thanks to the creative insanity of Go Nagai, master of
cheese, sleaze, and gratuitous violence, Black Lion is so bad it
can actually be a lot of fun to watch.
It's splatterfest punctuated by one nonsensical plot twist after
another from start to finish, but that magic Nagai touch makes it
over-the-top and whacked-out enough to be worth laughing at with a
bunch of friends if that's your thing. If it's not... well, you've
been warned.
[/quote]
