With Sunday¡¯s shutdown of Kansai Electric Power Co.¡¯s Oi No. 4 reactor for regular safety inspections, Japan will be without nuclear power for the first time since July 2012.

How long it stays that way is the subject of a political struggle involving local governments hosting the plants, utility customers concerned about price increases, pro-nuclear politicians, and a Nuclear Regulation Authority trying to grapple with the crisis at Fukushima No. 1 even as it faces pressure to divert limited personnel and funds to speed up safety inspections at plants elsewhere.

Sunday¡¯s shutdown in Oi, Fukui Prefecture, follows that of the plant¡¯s No. 3 reactor earlier this month for regular inspections, which must take place approximately every 13 months.