In April, 2000, Route 73 that operated in a loop-route within Yawata City (Uchizato - Nishi Iwata loop-routed bus, counterclockwise bound) and Route 73A that ran to Uchizato Minami, the bus stop on the way to Route 73, were established.
2000年4月に八幡市内を走行する循環路線の73系統（内里西岩田循環左回り）と途中の内里南まで運行する73A系統が設定された。