Rubuta ci gaba ga wannan sakin layi - An buɗe tashar Kamaishi a ranar 17 ga Satumba, 1939. Layin Kamakishi ya fara aiki daga 11 ga Oktoba, 1944. Tashar ta kuma zama tashar tashar tashar don Layin Miyako a ranar 27 ga Fabrairun 1972. An keɓance wannan layin a ranar 1 ga Afrilu 1987, ya zama layin Sanriku Railway South Rias Line. An haɗu da Tashar Kamaishi a cikin hanyar JR ta Gabas bayan keɓance hanyoyin jirgin ƙasa na Japan (JNR) a ranar 1 ga Afrilu 1987. Girgizar kasa da tsunami na Tōhoku na 2011
a ranar 11 ga Maris 2011 ya lalata yawancin waƙoƙi da tashoshi da yawa na Layin Yamada tsakanin Miyako da Kamaishi. A watan Fabrairun 2012, JR Gabas a hukumance ta ba da shawarar cewa a soke wannan sashin Layin Yamada kuma a yi amfani da hanyar da za a yi amfani da ita azaman hanyar jigilar bas mai sauri (BRT) amma daga baya an soke wannan shawarar kuma an dawo da layin har sai an canja shi zuwa Railway Sanriku. A ranar 23 ga Maris, 2019, an sake buɗe sashin Layin Yamada daga Miyako zuwa Kamaishi kuma an canja shi zuwa Railway Sanriku. Wannan ya haɗu da Layin Kita-Rias a gefe ɗaya da Layin Minami-Rias a ɗaya gefen wanda tare suka zama duka Layin Rias. Dangane da haka, wannan tashar ta zama tashar tsaka-tsakin layin Rias.