noun
body modification
Refers to deliberate physical alterations such as tattoos, piercings, scarification, implants, or cosmetic surgery. Often used in subcultural or medical contexts.
彼は身体改造の一環として、背中に大きなタトゥーを入れた。
As part of his body modification, he got a large tattoo on his back.
身
Body modification can sometimes involve health risks.