Japanese Prime Minister Naoto Kan has announced his resignation as president of the Democratic Party of Japan, paving the way for the nation's sixth leader in five years.
By stepping down, Mr Kan effectively ended his turbulent 14 months in power.
He was criticised for his response to Japan's worst post-war crisis following the 11 March earthquake, tsunami and Fukushima nuclear accident.
'I propose to you that I resign as the leader of the Democratic Party of Japan today,' Mr Kan told party members.
'Once a new leader is elected, I will resign promptly as prime minister and my cabinet will resign en masse.'
A leadership election for a new party president, who would then become prime minister, is expected on Monday. Parliament will then vote the leader in as prime minister on Tuesday next week.
A relaxed Mr Kan reflected on his time leading Japan in its worst post-war crisis. 'I believe I did my best and did what I had to do in severe conditions,' he said.
He added that he would continue to work on nuclear-related issues as a politician and pursue 'a society that does not rely on nuclear plants'.
After surviving a no-confidence vote in June, Mr Kan said he would quit on condition that three key bills were passed - a second budget, a budget financing bill and legislation promoting the use of renewable energy.
The budget for reconstruction in quake-hit areas was approved in July, while the final two bills were passed today, clearing the way for him to step down.
Up to nine candidates could end up battling to succeed Mr Kan, including the favourite, former foreign minister Seiji Maehara.
Finance Minister Yoshihiko Noda may also file for candidacy when campaigning begins tomorrow.
Whoever wins faces the unenviable task of overseeing Japan's biggest post-war reconstruction, resolving the world's worst nuclear crisis since Chernobyl 25 years ago and shielding the economy from a soaring yen.
They must also unite a divided parliament and win market confidence.
