UPDATE 1-Saudi keeps June crude supplies to Japan steady

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TOKYO, May 12 (Reuters) - Saudi Arabia, the world's top crude exporter, will supply full contracted volumes of crude oil in June to two Japanese lifters, steady from May levels, industry sources said on Monday.

"The supply will be the contract volume for June," said the source with a Japanese refiner.

A second source with another Japanese lifter also said the supply was steady at full contracted volume for June.

The two lifters did not ask Saudi Arabia for additional volumes on top of the contracts, the sources said.

Traders had expected Saudi allocations to remain steady following a March agreement by Saudi Arabia and the rest of the Organisation of Petroleum Exporting Countries to keep output unchanged.

"There was no advance information for a cut, so it was pretty much expected," said the second source.

South Korean traders could not be immediately reached for comment.

Asian customers have been receiving mostly full contract volumes since November last year.