The Tanimachi Line (谷町線, Tanimachi-sen) is a rapid transit line of the Osaka Municipal Subway, running from Dainichi Station in Moriguchi to Yaominami Station in Yao through Osaka City. Its official name is Rapid Electric Tramway Line No. 2 (高速電気軌道第2号線), while the Osaka Municipal Transportation Bureau refers to it as Osaka City Rapid Railway Line No. 2 (大阪市高速鉄道第2号線), and in MLIT publications, it is written as Line No. 2 (Tanimachi Line) (2号線（谷町線）).