https://toxicworks.net/blog/2024/06/28/japan-vintage-vehicle%e3%80%80kawamura/

 The base is a dead stock utility bicycle from Kawamura Sangyo, which I believe is from the early to mid-1970s.
 Based on this, I hand-built a wheel with a 650 B size and a track hub.
 The handlebars, cranks, and other components are fitted with retro parts.
 However, even though we call them vintage cycles, we don't just assemble them using old parts. We also incorporate current parts while maintaining their functionality.
 The frame itself is made from deadstock parts, and almost all of the other parts are brand new.