1972 - Designed the series "Box and Cox", in which he elaborated on the theme of the egg, creating a cube out of paperboard, with a zigzag border, and revealing a smaller cube in yellow. The series also includes three dimensional paper designs of a banana and a piece of cheese.

There aren't any objects involving Katsu Kimura that have been photographed yet or maybe they have (had their pictures taken) but we can't show them to you right now.

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<ref name=CH>{{cite web |url=https://collection.cooperhewitt.org/people/18053701/ |title=Katsu Kimura |author=Cooper Hewitt, Smithsonian Design Museum |accessdate=12 April 2021 |publisher=Smithsonian Institution}}</ref>