Mr. Wolf, What Time Is It?

"Ookamisan Ima Naji?"
Text: Nakagawa Hirotaka, llustration: Yamamura Koji
Gakken
1st edition: 2019.05.28, 2nd edition: 2019, 3rd edition: 2020.03, 4th edition: 2021.04.20, 5th edition: 2022.01.20, 6th edition: 2022.10.01

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My Favorite Things

"Boku ga Sukina Koto"
Text: Nakagawa Hirotaka, Illustration: Yamamura Koji
Happy Owl Sha (Koseisha)
32 pages
1st edition: 2015.02.06

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난 신기하고 이상한 것이 참 좋아!

Bokuga Sukinakoto Korean version
Text: Nakagawa Hirotaka, Illustration: Yamamura Koji
Gilbut Children Publishing
32 pages
1st edition: 2017.11.01
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