Tokyo metro and Toei subway lines

The Tokyo subway system comprises two connected networks run by the Tokyo Metro and Toei Subway. The privately owned Tokyo Metro runs 9 lines, and the Tokyo Metropolitan Government, or "Toei," runs 4.

Tokyo Metro operated lines are: Chiyoda Line, Ginza Line, Fukutoshin Line, Hanzomon Line, Hibiya Line, Marunouchi Line, Nanboku Line, Tozai Line and Yurakucho Line.

Toei Subway operated lines are: Asakusa Line, Mita Line, Oedo Line, Shinjuku Line.
>>Tokyo Metro Co., Ltd<<

Tokyo Subway Map
Tokyo metro and Toei subway lines in Tokyo have announcements on the train of the next station in Japanese and frequently in English too.
Having two different comprises in the one metropolis may sound confusing, and, to be sure, the two systems are not fully integrated in that transferring between them requires going through a ticket wicket.

However, the use of a prepaid card like the PASUMO and SUICA rechargeable card makes transferring as smooth as if they were integrated.