Hoop setter Sagariwauchi (For Chisel Ring Set up) by Ouchi 宗家大内 下り輪打

This tool is not commonly available in North America
Though a hoop ring can be set with some difficulty using a small pry bar as shown in some internet videos, this tool does a perfect job of evenly setting the ring

An excellent tool makes it much easier to set the hoops

Hoop setter Sagariwauchi (For Chisel Ring Set up) by Ouchi 宗家 大内 下り輪打

Perfect

Good