Resource-rich Australia has committed to extend $250 million for four years from 2015/16 for war-stricken, yet also resource-rich country Afghanistan.

The announcement by Australian Foreign Minister Bob Carr was made at Sunday's global aid for Afghanistan conference in Tokyo, where U.S. Secretary of State Hillary Clinton and Afghan President Hamid Karzai also attended.

Australia's pledge of $1 financial billion to Afghanistan will go to improving governance, building schools and developing natural resources.

"All the nations at the conference are resolved that Afghanistan can be rebuilt . . . and trade and investment can grow," Mr Carr said in The Australian.

A total of $US16 billion ($A15.74 billion) of aid to Afghanistan were pledged by participating donor nations over the next four years, but reiterated the war-stricken nation must exert all means to crack down, if not totally end, corruption.

The huge amount of pledges actually tantamount "that the world had not lost interest" on Afghanistan, Mr Carr said, but yes, donor nations want firm commitments that the Afghan government will work for more transparency and less graft.

Citing World Bank data, The Australian reported that in 2010-11, foreign donor spending on defence and development made up more than 95 per cent of Afghan GDP.

"The world is moving from 'fighting' to 'building' in Afghanistan - good news, but not without risks in the form of poor corruption controls," Mr Carr said.