Japan beer giants raided over suspicions they colluded to set the price of beverages

Investigators probe Asahi, Kirin, Suntory and Sapporo breweries - which together control more than 90% of Japan's beer market

Japanese authorities have raided the country's four biggest breweries over suspicions they colluded to set the price of beer and other beverages - a practice media reports said could have forced drinkers to pay over the odds.

Officials from the Fair Trade Commission this week searched the offices of Asahi Breweries, Kirin Brewery, Suntory Beer and Sapporo Breweries - which together control more than 90% of the domestic market. The quartet are suspected of violating the anti-monopoly law.