01 / Station
Using monochrome photos to choose materials and colors,the 1921 station building was restored.

The Koiwai Station building is a single-story timber structure with a gabled roof and a nationally registered tangible cultural property. The city says it chose materials and colors from old monochrome photos using AI restoration, and kept the ticket counter. The city manages it, and the Koiwai neighborhood association cleans it.
- Built 1921
- Registered Aug. 6, 2025
- 17.3 m by 4.6 m
