Minami, Nobunaga (5 April 2009). 伊藤潤二の猫日記 よん＆むー [著]伊藤潤二. asahi.com (in Japanese). The Asahi Shimbun. Archived from the original on 15 April 2009. The Unreveal: Gorou, the skittish and elusive stray cat A-ko's parents adopted, is always drawn as a shadowy blob to represent J-kun's unfamiliarity with him. Despite J-kun's attempts to befriend him and then lamenting that he still hasn't gotten a good look at him in over a year, the reader never sees him drawn as an actual cat, remaining a shadow even when Mu plays with him. The individual chapters detail different episodes of dealing with cats, from their adoption to them curling up on a bed to one escaping and being caught. It's entertaining enough for cat lovers and owners, but one obviously shouldn't expect Ito's usual creativity. It is, after all, a cat diary. Ito was smart enough to end it after 10 chapters, before the cat's antics became repetitive, and the charm of the horror-style presentation faded away. Ito, Junji (2015). "Bonus Manga". Junji Ito's Cat Diary: Yon & Mu. Kodansha Comics USA. pp.115–121. ISBN 978-1-63236-197-4.

this is a comedic-horror manga, and it speaks to those of us who have invited these little devils into our hearts and homes, and the everyday horrors we endure as a result. Price, Austin (1 November 2018). "Comic Horror: The Work of Junji Ito". The Comics Journal. Archived from the original on 28 November 2019 . Retrieved 28 November 2019. What I'll say is that, personally, there was a LOT of interviews with Junji Ito rather than manga panels. I didn't understand why that was necessary. A few quotes here or there would have sufficed.Art-Style Dissonance: Played for Laughs, since Ito still uses his trademark scary art techniques despite this manga being a Slice of Life story about cats rather than his typical horror fare.

Bittersweet Ending: A bonus comic included in the collected edition reveals that Yon-kun eventually died of heart failure, but J-kun treasures the time they had together, thanking Yon for being in his life. Ito's wife Ayako included a letter telling her side of the story, talking about Yon-kun's final days. Junji Ito later did a followup video with Crunchyroll, showing the two new cats that he adopted in Yon and Mu's memory. Ito is a strong enough writer to make this sort of story stand on its own. His ability to manipulate reader’s emotions is by no means limited to inducing terror. He’s also able to play with feelings of love and affection, succinctly conveying the rapid change and growth in his feelings for the titular Yon and Mu. And as good as all of that is, it honestly isn’t where the magic in this story comes from. junji ito is a writer/illustrator known for his horror manga, and here he focuses his energies on the most horrible horror of them all - the domestic cat.I feel that without prior knowledge of his works, this will come off as just a bizarre little book and many won’t get the joke. That said, people who are into his sort of horror might not like that when all is said and done, he just wrote a cute little book about his cats.