Located on the intricate ria coast of the Oshika Peninsula, Tohoku Electric Power's Onagawa nuclear power plant — which was restarted on Tuesday — sits amid a maze of narrow, winding mountain roads and remote islands with few transportation options.

When the Great East Japan Earthquake struck in 2011, several sections of evacuation routes along prefectural roads were closed. Residents now fear about their ability to escape if another disaster hits.

According to Miyagi Prefecture's road management division, two main coastal prefectural roads along the peninsula were partially closed after the earthquake due to road surface collapses, while another inland road saw nine landslides that cut off isolated communities for around 10 days.