Gintama Season 4 Episode 8: Battle on Rakuyo Arc: Part 8 - Master of Kouan
Episode 8 of 12 of Gintama Season 4, aired February 25, 2017, 25 minutes. Available with English subtitles and dub where released.
Episode summary
As Umibozu faces Utsuro, he recalls the strongest enemy he has ever faced: someone you can find in every corner of the universe.