noun which may take the genitive case particle 'no'
Used as a prefix-like element in compounds such as 超高層 (skyscraper), 超高圧 (ultra-high voltage), or 超高級 (super high-grade). Not a standalone adjective.
超高層ビルが立ち並ぶ。
Skyscrapers stand in a row.
超高圧の電流を扱う。
Handle ultra-high voltage current.