More than 36,000 households had lost power in Ishikawa and Toyama prefectures, utilities provider Hokuriku Electric Power (9505.T) said. High speed rail services to Ishikawa have been suspended while telecom operators Softbank (9434.T) and KDDI (9433.T) reported phone and internet service disruptions in Ishikawa and Niigata, according to their websites. Japanese airline ANA (9202.T) turned back four planes headed to airports in Toyama and Ishikawa midair after the quake, while Japan Airlines (9201.T) cancelled most of the flight services to Niigata and Ishikawa regions for the rest of the day, according to TV Asahi. Japan's Nuclear Regulation Authority said no irregularities have been confirmed at nuclear power plants along the Sea of Japan, including five active reactors at Kansai Electric Power's (9503.T) Ohi and Takahama plants in Fukui Prefecture.