The brand also appears once in Azumanga Daioh: Supplementary Lessons where Tomo wears a T-shirt identical to that of Yotsuba's. In Japan, real-life Kodomo Usagi T-shirts were for sale at a Yotsuba&! art gallery celebrating the 10th anniversary of the concept, starting with the Try! Try! Try! one-shot from 2001. The exhibition ran from March 8th, 2011, to March 20th.