"The Shopping District's Progress" is a collection of 16 titles. The title story, "The Shopping District's Progress," is a short story that begins with a shopping district that was far from the author's house yesterday expanding overnight, and the author's house becoming part of the shopping district. Other works included are "The House of the House," a story about a friend's house that is unusually large and maze-like; the "Where am I? Journey" series, in which the protagonist deduces where he is from clues on the spot; and "The Correct Way to Open Onigiri," which describes the steps the protagonist takes to open onigiri stickers from convenience stores.