  km ▁and ▁ 1 ▁station ▁to ▁the ▁north ▁( from ▁I se zak ich ō j am achi ▁to ▁K ann ai ); ▁the ▁ 2 . 8   km ▁long ▁initial ▁section ▁of ▁Line ▁ 3 ▁between ▁K ann ai ▁and ▁Y ok oh ama ▁also ▁opened ▁that ▁same ▁day ▁and ▁trains ▁began ▁operating ▁directly ▁between ▁Line ▁ 1 ▁and ▁Line ▁ 3 ▁at ▁that ▁time . ▁ ▁On ▁March ▁ 1 4 , ▁ 1 9 8 5 , ▁two ▁extensions ▁opened : ▁a ▁ 7 . 0   km , ▁ 5 ▁station ▁extension ▁of ▁Line ▁ 3 ▁from ▁Y ok oh ama ▁to ▁Shin - Y ok oh ama , ▁and ▁a ▁ 2 . 0   km , ▁ 2 ▁station ▁extension ▁of ▁Line ▁ 1 ▁from ▁K amin ag aya ▁to ▁Mai oka . ▁Line ▁ 1 ▁would ▁be ▁extended ▁by ▁one ▁station ▁to ▁T ots uka ▁( a ▁distance ▁of ▁ 1 . 7   km ) ▁on ▁August ▁ 2 7 , ▁ 1 9 8 9 ; ▁a ▁temporary ▁station ▁was ▁in ▁operation ▁at ▁that ▁location ▁from ▁May ▁ 2 4 , ▁ 1 9 8 7 ▁until ▁that ▁date . ▁The ▁final ▁ 1 0 . 9   km ▁section ▁of ▁Line ▁ 3 ▁from ▁Shin - Y ok oh ama ▁to ▁Az am ino ▁opened ▁on ▁March ▁ 1 8 , ▁ 1 9 9 3 . ▁The ▁final ▁ 7 . 4   km ▁section ▁of ▁Line ▁ 1 ▁from