Japan's Prime Minister Naoto Kan Resigns

TOKYO Aug. 26, 2011— -- Embattled Japanese Prime Minister Naoto Kan stepped down today, amid mounting criticism over his government's handling of the country's worst natural disaster and nuclear accident.

His resignation comes two months after Kan vowed to take responsibility for the crisis, and nearly 15 months after he rose to power, making him the sixth prime minister to step down in five years.

The ruling Democratic Party of Japan will vote for its new leader on Monday, paving the way for Kan's replacement.

"I feel that I've done everything necessary, under these difficult circumstances," Kan told DPJ lawmakers, in a nationally televised address. "Now I would like to see you chose somebody respectable as the new prime minister."

Japan has been plagued by political instability at a time when it faces an increasingly challenging economic climate. The country's public debt is now more than twice its GDP, and the Japanese yen has battered exporters as it hovers at a post-war high against the dollar. The world's third largest economy is tasked with rebuilding tsunami ravaged communities along the northeast coast, a reconstruction effort that is estimated to cost more than $200 billion.

Japan Readies for Sixth Prime Minister in Five Years

Kan, 64, was seen as a political maverick when he first took office last June. Unlike most Japanese lawmakers who are born into political families, Kan was considered a self-made man who rose through the ranks as a civic activist. He eventually became the health minister in the 1990s, when he garnered national attention for exposing the cover-up of a scandal involving HIV tainted blood products.

But Kan's honeymoon with voters didn't last long. Shortly after taking office as prime minister, his approval ratings started to slip after signaling he would raise the national sales tax to cope with mounting debt problems. The proposal cost the DPJ the upper house election one month later. Prior to the March 11 disasters, Kan faced calls for his removal over a political funding scandal.

"In some ways, the March 11 disasters prolonged Kan's fate," said Yasunori Sone, political science professor at Keio University. "He was on the verge of being forced out when the earthquake and tsunami hit. They extended his lifeline."