Funny, I don't recall the cat in the book being so bumbling and destructive. Guess that's why I need to read it again.
Despite my attempts at research, I could not find out why a wild boar is Mitsui's mascot. I shouldn't question it; Japanese companies always use cute characters in their advertising. At the beginning of the commercial, the pig says that he's not a cat, he's an uribo; and at the end of the commercial, the announcer says "Let's uribo campaign." I've looked through every Japanese-to-English dictionary at my disposal, and I can't figure out what an uribo is. Is it another name for wild boar? Is it another delightful Japanese play on words that can't be found in a dictionary?
I also can't figure out who the actress is and why they chose and actress to portray such a prominent and important literary figures. I understand it's a parody, but still.
What I do know is that Natsume Sōseki is one of Japan's most revered authors. His likeness currently appears on the 1,000 yen note, although I've read that he's going to be replaced soon. I read his book Kokoro in my Japanese history class when I was a senior in college. That was about a thousand years ago, so I should probably re-read that one, too.