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In this photo taken April 7, 2012, three reactors, from left, No. 1, No. 2 and No. 3, at the Tomari Nuclear Power Plant, operated by Hokkaido Electric Power Co., in Tomari are seen from a port in Iwanai town in Japan's northernmost main island of Hokkaido. Japan will be free of atomic power for the first time since 1966 on Saturday, May 5, when the Tomari No. 3 reactor, the last of its 50 usable reactors, is switched off for regular inspections. The central government would like to restart them at some point, but it's running into strong opposition from local citizens and governments. JAPAN OUT, MANDATORY CREDIT, NO LICENSING IN CHINA, HONG KONG, JAPAN, SOUTH KOREA AND FRANCE
TOKYO—Hundreds of Japanese are marching and waving "No nukes" banners to celebrate the last of this nation's 50 nuclear reactors switching off.

The crowd at a Tokyo park Saturday said they were not concerned about government warnings of power shortages.

One of three reactors at Tomari nuclear plant in the northern island of Hokkaido is going offline for routine maintenance checks.

After last year's March 11 quake and tsunami set off meltdowns at Fukushima Dai-ichi plant, no reactor stopped for checkups has gone back up. Japan requires new tests on withstanding quakes and tsunamis, and it needs local residents' approval to restart reactors.