A nuclear reactor at the Genkai power plant in Saga Prefecture resumed operation Friday for the first time in over seven years, despite lingering concerns from residents about evacuation plans from nearby islets in the event of a serious accident.

Kyushu Electric Power Co.'s No. 3 unit at the plant was halted for a regular inspection in December 2010, three months before a massive earthquake and tsunami triggered a crisis at the Fukushima No. 1 nuclear plant.

The reactor cleared a safety screening by the Nuclear Regulation Authority in January 2017 under stricter, post-Fukushima crisis regulations and was later approved for reactivation by the Genkai Municipal Government and Saga Prefectural Government. It became the seventh reactor in the nation to restart under the tougher regulations.