also: スーパーウエルターきゅう
noun
super welterweight
A weight class in boxing and other combat sports, between welterweight and middleweight.
彼はスーパーウェルター級のタイトルを防衛した。
He defended his super welterweight title.
The weight class immediately above super welterweight.
Borrowed from English 'super welterweight', combined with the Japanese suffix 級 (class/division).