Lighthouses come in a variety of shapes and sizes. And, since ancient times, they have been important guides that ensure the safety of sailors. The "Lighthouse Encyclopedia Shirt" is made from printed fabric featuring lighthouses and their related beacons as motifs. While lighthouses indicate the location of ships and ports, beacons play the role of warning of dangerous places such as reefs and shallows. For this project, we asked lighthouse enthusiasts, who are also staff members of the sailing ship "Mirai e" (with whom we collaborated on the "Smooth Sailing Shirt"), to supervise the design, and we created the shirt together from the selection of lighthouses. A total of 12 lighthouses and beacons are depicted.