Major Japanese retailer Seven & i Holdings Co. said Monday its U.S. unit 7-Eleven Inc. will acquire Speedway LLC, a U.S. convenience store and petro station network, for $21 billion to expand revenue sources.

The deal reached Monday between the parent of the Seven-Eleven convenience store chain and U.S. oil refiner Marathon Petroleum Corp., owner of Speedway, came as part of the Japanese retail giant's efforts to bolster its overseas business to offset Japan's shrinking market.

==Kyodo

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