That's Forty-Seven Ronin, Ooishi Kuranosuke!

Meow Meow Japanese History · Episode 24 · “That's Forty-Seven Ronin, Ooishi Kuranosuke!”

The story imagines if Japanese historical figures such as Queen Himiko, the warlord Oda Nobunaga, and samurai Sakamoto Ryouma were cats. (Source: Anime News Network)