The manufacturer’s covers are made of metal

 

and are round in shape

 

.

No colored or gilded covers were found from this manufacturer.
City symbols also do not appear on the manufacturer’s covers.

The purpose of a cover can be identified as follows: 電気 on electricity covers

 

, 通信 on communication covers

 

, and 信号用 on covers used for traffic signal infrastructure

 

.

The year of manufacture is generally not indicated.

Standards
The manufacturer’s covers do not bear standard markings.

Typical covers
All the manufacturer’s covers found on the site have a uniform background consisting of a pattern made up of narrow rectangles, each missing one of its sides

 

. There are 5 manhole covers in the site that are made by the Manufacturer
Click for the 5 covers made by Fukunishi Foundry (Of these, 0 are best covers)