| Area | No. of Customers | Cities / Towns |
|---|---|---|
| Fukuoka | 535,000 | Fukuoka, Kasuga, Onojo, Itoshima, Fukutsu, Koga, Munakata, Miyawaka, Asakura, Nakagawa, Kasuya, Shingu, Shime |
| Kitakyushu | 297,000 | Kitakyushu, Nakama, Mizumaki, Kanda, Onga, Ashiya, Okagaki Town |
| Kumamoto | 114,000 | Kumamoto, Koshi, Kikuyo, Mashiki, Ozu, Kashima, Mifune |
| Nagasaki | 115,000 | Nagasaki, Nagayo, Togitsu |
| Shimabara | 6,000 | Shimabara |
| Sasebo | 43,000 | Sasebo |
| Total | 1,110,000 |