こうつうきかん koutsuukikan
transportation, transit
mingle, mixing, association, coming & going
N3
traffic, pass through, avenue, commute, counter for letters, notes, documents, etc.
N4
loom, mechanism, machine, airplane, opportunity, potency, efficacy, occasion
connection, barrier, gateway, involve, concerning
交通機関の発達（はったつ）
交通工具的發達
