Are there any standards or procedures for installing drainage facilities in residential lands?

In order to install drainage facilities in residential land, it must conform to the standards stipulated by laws and regulations.

For more information, please refer to the "Yokohama City Drainage Equipment Manual".

In that case, please submit "drainage equipment () plan confirmation application" to Public Works Office of each ward.
We can download "Yokohama-shi drainage equipment manual" from Yokohama-shi homepage.

In addition, when Internet is not available, we can read thing which we printed in Yokohama-shi citizen information center (city hall the third floor).

Yokohama City Drainage Equipment Handbook
Confirmation of drainage facilities