TOKYO, Jan 19 (Reuters) - Japan's Kansai Electric Power Co Inc has restarted the No. 4 reactor at its Ohi nuclear plant in western Japan after completing scheduled maintenance and refuelling, a spokesman said on Tuesday. The utility began booting up the 1,180-megawatt (MW) reactor on Jan. 15 after having been shut for regular maintenance since Nov. 3, the spokesman said via phone. The Osaka district court in December revoked the operating permit for Ohi's No.3 and No.4 reactors, claiming they were vulnerable to major earthquakes, but the government, which had granted the permit, has filed an appeal to overturn the ruling. The ruling by the district court does not take effect until the final ruling is made, enabling Kansai Electric to keep operating those reactors until then, according to an official at the Nuclear Regulation Authority. Kansai Electric has had no operating reactors since early November. With the restart, Japan now has four operating nuclear reactors with a total capacity of 4,140 MW. Many reactors are still going through a re-licensing process under the latest safety standards imposed after the 2011 Fukushima disaster. Nine regional power utilities and a wholesaler, Japan Atomic Power Co (Japco), now have 33 reactors available for commercial use, with a combined generating capacity of 33,083 MW. The companies had 54 reactors operating before the Fukushima disaster. The table below shows the status of Japan's nuclear power plants. The regional utilities are Hokkaido Electric Power , Tohoku Electric Power, Tokyo Electric Power , Chubu Electric Power, Hokuriku Electric Power , Kansai Electric Power, Chugoku Electric Power , Shikoku Electric Power, Kyushu Electric Power , referred in the table by their regional name. Company Plant Unit MW Status Hokkaido Tomari 1 579 Shutdown 22/4/11 Hokkaido Tomari 2 579 Shutdown 26/8/11 Hokkaido Tomari 3 912 Shutdown 5/5/12 Tohoku Onagawa 2 825 Shutdown 6/11/10 Tohoku Onagawa 3 825 Shutdown 11/3/11 Tohoku Higashidori 1 1,100 Shutdown 6/2/11 Tepco Kashiwazaki-Kariwa 1 1,100 Shutdown 6/8/11 Tepco Kashiwazaki-Kariwa 2 1,100 Shutdown 16/7/07 Tepco Kashiwazaki-Kariwa 3 1,100 Shutdown 16/7/07 Tepco Kashiwazaki-Kariwa 4 1,100 Shutdown 16/7/07 Tepco Kashiwazaki-Kariwa 5 1,100 Shutdown 25/1/12 Tepco Kashiwazaki-Kariwa 6 1,356 Shutdown 26/3/12 Tepco Kashiwazaki-Kariwa 7 1,356 Shutdown 23/8/11 Chubu Hamaoka 3 1,100 Shutdown 29/11/10 Chubu Hamaoka 4 1,137 Shutdown 13/5/11 Chubu Hamaoka 5 1,380 Shutdown 14/5/11 Hokuriku Shika 1 540 Shutdown 1/3/11 Hokuriku Shika 2 1,206 Shutdown 11/3/11 Kansai Mihama 3 826 Shutdown 14/5/11 Kansai Takahama 1 826 Shutdown 10/1/11 Kansai Takahama 2 826 Shutdown 25/11/11 Kansai Takahama 3 870 Shutdown 6/1/20 Kansai Takahama 4 870 Shutdown 7/10/20 Kansai Ohi 3 1,180 Shutdown 20/7/20 Kansai Ohi 4 1,180 Online 15/1/21 Chugoku Shimane 2 820 Shutdown 27/1/12 Shikoku Ikata 3 890 Shutdown 26/12/19* Kyushu Genkai 3 1,180 Online 21/11/20 Kyushu Genkai 4 1,180 Shutdown 19/12/20 Kyushu Sendai 1 890 Online 17/11/20 Kyushu Sendai 2 890 Online 22/12/20 Japco Tokai Daini 1 1,100 Shutdown 11/3/11 Japco Tsuruga 2 1,160 Shutdown 7/5/11 Total 33,083 * Under court order to keep operations halted (Reporting by Yuka Obayashi.)