henna tattoo
A temporary tattoo made with henna dye, often applied for decorative or ceremonial purposes.
旅行先でヘナタトゥーを入れてもらった。
I got a henna tattoo while traveling.
Loanword from English 'henna tattoo', itself from Arabic حِنَّاء (ḥinnāʾ) and English 'tattoo'.