Japan issued a tsunami advisory early Saturday after a strong 6.8-magnitude quake struck in the Pacific off Fukushima prefecture, authorities said.

The Japan Meteorological Agency said a local tsunami of up to one meter (3.3 feet) could impact the Pacific coastline in Fukushima, Iwate and Miyagi prefectures after the quake, whose epicenter U.S. geologists placed at a depth of 10 kilometers.

"No more Hiroshimas!" ''No more Fukushimas!" Those slogans are chanted together at rallies by Japanese who want both an end to nuclear power in the island nation and an end to nuclear weapons around the world. But many in this city, where the world's first atomic-bomb attack killed tens of thousands, are distressed by efforts to connect their suffering to the tsunami-triggered meltdowns at the Fukushima Dai-ichi nuclear plant.

Like the bomb the United States dropped on Hiroshima Aug. 6, 1945, the March 2011 Fukushima disaster unleashed radiation that will affect the region's health for decades. Hiroshima medical experts, the world's most renowned on radiation-related sicknesses, are being called on for advice on how the meltdowns may have harmed people who lived near the power plant along the northeastern coast of Japan.

Typhoon Man-yi hit central Japan Monday, with almost 300,000 households told to evacuate and fears the storm could go on to hit the crippled Fukushima nuclear plant.

The typhoon made landfall in Toyohashi, Aichi prefecture, shortly before 8:00 am (2300 GMT Sunday), packing gusts of up to 162 kilometers (100 miles) per hour, the Japan Meteorological Agency said.

The Japanese government on Monday unveiled a $470 million plan to stem radioactive water leaks at Fukushima, including freezing the ground underneath the stricken nuclear plant.

Chief Cabinet Secretary Yoshihide Suga told a news conference that officials had a project to pipe refrigerant through buried pipes and to decontaminate toxic water.

Japan's nuclear regulator on Wednesday upgraded its evaluation of a radioactive water leak at the crippled nuclear plant in Fukushima to a level three "serious incident".

The assessment, on an international scale of zero to seven with seven being the worst, came after operator Tokyo Electric Power Company (TEPCO) said some 300 tonnes of radioactive water was believed to have leaked from a tank at the Fukushima Daiichi nuclear power plant.

Police in southern India on Tuesday arrested dozens of activists accused of leading violent protests against the loading of uranium at a new nuclear power plant.

One fisherman was shot dead by police on Monday as hundreds of protesters clashed with armed officers in Tamil Nadu state's Koodankulam region, where crowds tried to lay siege to the Russia-backed project.

Tens of thousands of people rallied in Tokyo on Monday demanding an end to nuclear power, the latest in a series of anti-atomic gatherings following the tsunami-sparked disaster at Fukushima.

Demonstrators marched through streets near Yoyogi park under scorching sunshine on a national holiday, chanting in chorus: "Don't resume nuclear power operation. Prime Minister (Yoshihiko) Noda should quit."

The nuclear accident at Fukushima last year was a "man-made disaster" and not only due to the tsunami, a Japanese parliamentary panel said Thursday in its final report on the catastrophe.

"The TEPCO Fukushima Nuclear Power Plant accident was the result of collusion between the government, the regulators and TEPCO, and the lack of governance by said parties," said the report by the Diet's Fukushima Nuclear Accident Independent Investigation Commission.

Japan prepared to bring nuclear power back online by reactivating one of its idled reactors on Sunday, defying growing public protests since last year's meltdowns at Fukushima.

Hundreds of protesters blocked the road to the front gate of the Oi plant in western Japan, according to media reports, with work scheduled to begin at 9:00 pm (1200 GMT) to remove rods that have stopped nuclear fission in the reactor.

No individual can be held responsible for the nuclear meltdowns at Fukushima, Japan's prime minister said Saturday, insisting everyone had to "share the pain".

Yoshihiko Noda told foreign journalists in Tokyo that the Japanese establishment had been taken in by the "myth of safety" around nuclear power and was unprepared for a disaster on the scale of last March's accident.