The International Energy Agency has listed members' contributions to a 120 million barrel release of crude and oil products from emergency stockpiles aimed at cooling global oil prices after Russia's invasion of Ukraine.
The release of stocks by the US-allied members of the IEA would be their second coordinated release in a month and would be the fifth in its history to confront oil market disruption.
The IEA is made up of 31 mostly industrialised countries but not Russia.
It is the largest release from non-US IEA countries on top of the biggest release by the US.
Global oil prices are headed for their second weekly drop with Brent falling about $10 to below $100 a barrel since the US announced its largest ever oil reserve release in late March.
Prices hit 14-year highs last month as Western sanctions on Russia disrupted crude and oil product exports from the world's number two crude exporter.
The commitments made by members reached 120 million barrels to be released over a six-month period, the IEA said.
In addition to a 60 million barrels release from the US, Japan, the second biggest contributor, said it would release a record 15 million barrels.
Japan's Prime Minister Fumio Kishida said that Russia's invasion of Ukraine was "unforgivable" and the release would help curb oil prices.
"We must not forgive its invasion and war crimes. We will demonstrate our will with severe action," he said.
Russia says its forces are conducting a "special operation" in Ukraine.
Japan held about 470 million barrels of petroleum reserves at the end of January, equivalent to 236 days of domestic consumption, in state reserves, reserves held by refiners and a joint crude oil storage scheme with producing countries.
New Zealand said it would contribute crude and diesel to the IEA release.
"Our release is made up of around 184,000 barrels of crude oil held in Spain and close to 299,000 barrels of diesel held in the UK," New Zealand's minister of energy and resources, Megan Woods, said in a statement.
"There has been a great deal of volatility in global oil markets since the invasion and this further action, coupled with the United States' move to release 180 million barrels of oil over the next six months, will help to provide some certainty to the market," she said.
Other major contributors include South Korea, Germany, France, Italy and Britain.