Oyasai-Kudamono-Okashina Tabemono Karuta

Illustration: Yamamura Koji, Text: Ishizu Chihiro
Fukuinkan Shoten Publishers
1st edition: 2023.10, 2nd edition: 2024.11.10

Shinban Busyu Trump

TaroJiro-Sha Editus
Illustration: Yamamura Koji
1st edition: 2018.05.15

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Viva Vegetables Puzzle

Illustration: Yamamura Koji
Fukuinkan Shoten Publishers
1st edition: 2012.09.21, 2nd edition: 2012.12.05, 3rd edition: 2013.12.15, 4th edition: 2015.11.15, 5th edition: 2016.11.15, 6th edition: 2018.10.25, 7th edition: 2019.11.01, 8th edition: 2021.10.01, 9th edition: 2022.12.10, 10th edition: 2024.10.10

Busyu Trump

TaroJiro-Sha Editus
Illustration: Yamamura Koji
1998

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Katakana Card, 50 words

TaroJiro-Sha Editus
Illustration: Yamamura Koji
1996.03.15
20.8 x 14.6 x 3.4 cm

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Hiragana Card, 50 words

TaroJiro-Sha Editus
Illustration: Yamamura Koji
1995.11.15
21.2 x 14.6 x 3 cm

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Title unknown

Illustration Puzzle
illustrations by Yamamura Koji

Where's John?

Illustration Puzzle
Gakken
1992
Composition and illustrations by Yamamura Koji

Challenge 1: Amida Lottery

Junior High School First Year Course, Mar.
Gakken
1992

Challenge 2: Where's Animal ? Course

Junior High School First Year Course, Mar.
Gakken
1992

Challenge 2: Where's Animal ? Course

Sixth Grade Science, March.
Gakken
1992