I found 3 types of the Common Cable Manhole Covers at Osaka today.
I went to Ten-6 station of Osaka subway and went to Kakumanji temple,
which is famous within Kamigata Rakugo Fun.
Rakugo "Kakumanji" is not so popular but wel-knowned by Rakugo-Otaku.
Near that temple at Hinokuchi crossing these 3 as follows :
First one is standard size ; with Nihon Telephone and Telegram company's Logo
Second one and Third one are a little bigger than standard one.
Second one ; with the Japanese character Pump room.
Third one ; with Kansai Electric company's Logo