surfing; surfboarding
Refers to the sport of riding waves on a surfboard. The loanword is used in the same way as the English 'surfing'.
夏休みにハワイでサーフィンを楽しんだ。
I enjoyed surfing in Hawaii during summer vacation.
彼は毎朝、海へサーフィンに行く。
He goes surfing at the beach every morning.
In summer, I surf every week.
Let's go surfing on the next day off.
I've been learning surfing since last year.