相互乗り入れ そうごのりいれ mutual use of company facilities (e.g. rail tracks for through service, airport facilities, code-sharing, etc.) exp n Advanced ➥
足を踏み入れる あしをふみいれる to set foot into; to enter; to step inside; to cross the threshold exp v1 Advanced ➥
間に入る あいだにはいる to act as an intermediary; to step in; to come between; to intervene; to interject exp v5r Advanced ➥