noun
inter-high school sports competition
Wasei-eigo abbreviation of 'inter high'; refers specifically to the All Japan High School Athletic Meet, a major nationwide tournament.
wasei-eigo (Japanese-coined English), from inter high
今年のインターハイは北海道で開催される。
This year's Inter-High will be held in Hokkaido.
彼はインターハイで優勝した。
He won the Inter-High championship.