18 years old https://koputokiryo.com/%e3%80%90%e8%8b%b1%e8%aa%9e%e3%81%a7%e6%9c%80%e6%96%b0%e8%a8%98%e4%ba%8b%e3%82%92%e8%aa%ad%e3%81%bf%e4%b8%8b%e3%81%97%ef%bc%81%e3%80%9118%e6%ad%b3%e3%81%8c%e3%82%b8%e3%82%a7%e3%83%95%e3%83%bb%e3%83%99/18-years-old/