The operation style is sometimes called 'shin-zai chokutsu (unten)' (literally, through operation between a Shinkansen line and a regular railway line) because trains are operated through a Shinkansen line and a regular railway line.
また、このような運転形態を、新幹線と在来線を直通することから「新在直通（運転）」と呼ぶことがある。