1996: The station house was reformed in preparation for the opening of the subway's Tozai Line, whereby the entrance/exit gate area on the east side was renovated and the effective length of the platforms was extended from that for two-car trains to that for four-car trains, because it was scheduled that the use of four-car trains would soon start.
1996年（平成8年）地下鉄東西線開業に伴う駅改良工事、東改札口の改築と、列車4両化にあわせホームが有効長が2両から4両に延長される。