This required an extension somewhere south of (present ), probably to the then-Mekama Line of Tokyu (on the commencement of inter running to Mita and Namboku lines, the Mekama Line was divided into the Meguro Line and Tōkyū Tamagawa Line) which competed with TRTA Line 7, later called the Tokyo Metro Namboku Line.
This required an extension somewhere south of (present ), probably to the then-Mekama Line of Tōkyū, which competed with TRTA Line 7, later called the Namboku Line.-->Первый участок линии от станции до станции (10,4 км) был открыт 27-го декабря 1968-го года.