Hokkaido Electric Power Co. technicians monitor operations of their No. 3 unit power plant in the central power supply control center in Tomari, Hokkaido northern Japan. (AP)A traditional "Koinobori" carp-shaped banner flies at a rally protesting against the usage of nuclear energy in Tokyo. (AP)

An angler stands on a pier near Tomari Nuclear Power Plant, Japan. (AP)

No. 3 unit, right, of Tomari Nuclear Power Plant operated by Hokkaido Electric Power Co. is observed in Tomari, northern Japan. (AP)

Another shot of No. 3 unit, right, of Tomari Nuclear Power Plant operated by Hokkaido Electric Power Co, northern Japan. (AP)

A participant wears an anti-nuclear sign at a rally protesting against the usage of nuclear energy in Tokyo. (AP)

Participants gather at a rally protesting against the usage of nuclear energy in Tokyo. (AP)

A participant holds a ventriloquial dummy wearing anti-nuclear signs at a rally protesting against the usage of nuclear energy in Tokyo. (AP)

Participants confer at a rally protesting against the usage of nuclear energy in Tokyo. (AP)

Participants hold a traditional "Koinobori" carp-shaped banner during a march protesting against the usage of nuclear energy in Tokyo. (AP)

A traditional "Koinobori" carp-shaped banner flies at a rally protesting against the usage of nuclear energy in Tokyo. (AP)