Recently foreign tourists increased very much. I heard they don’t satisfy Tokyo subway because route map is very complicated.

So I give you some convenient tips.
First of all, I recommend you to get route map (printed on your guide book will be fine).
Secondly, check the color or alphabet of line and number of station you are going to use. The number of lines of Tokyo metro is 13 and all lines are assigned color and alphabet. Also each stations line up in numerical order. Therefore, once you check the color or alphabet of line and number of the station, you know where you are.
At the next tip, I will tell you other useful information of platform in stations.

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“I am called Sakuramochi. I am in charge of this territory. In other words, I am Boss!”