空理計画 is an independent game design and publishing brand focused on inventive tabletop and print-and-play games. Its catalogue includes board games, card games, solo experiences, cooperative puzzles, and two-player competitions, often built around distinctive themes and concise mechanical ideas. Players can simulate the life of trees in the board game Canopy of Trees, collect luminous objects in games such as Vectron and Tsuki no Utena, or explore patterns, numbers, and symbols through titles including Gematon, Alice Assemble, and East Rune.

Other releases feature paper miniatures, tactical card play, set collection, and imaginative worlds of gardens, ghosts, and mythical traditions. The site organizes its work across games, posts, and information about the creator, with sections for a wiki, store, digital works, publishing, and blog. It also shares creative material and game-making content, including a post about designing tile games.

Several titles are presented as print-and-play games, allowing players to print components and play at home. 空理計画 brings together original game concepts and accessible formats for people who enjoy thoughtful, thematic tabletop play