https://www.animenewsnetwork.com/encyclopedia/manga.php?id=2409
Azumanga Daioh (manga) - Anime News Network
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https://www.siliconera.com/new-yotsuba-manga-features-azumanga-daioh-cameo/
New Yotsuba Manga Features Azumanga Daioh Cameo - Siliconera
Feb 27, 2025 - The latest volume 16 of the Yotsuba manga featured an unexpected cameo from a beloved Azumanga Daioh character.
yotsuba mangaazumanga daiohnewfeaturescameo