Coca-Cola is recalling around 570,000 bottles of soft drinks in Japan.

The recall, confirmed on Monday (1 May), is the result of the discovery of iron powder in some products. Coca-Cola Japan has highlighted, however, that the drinks pose no health hazard to consumers, and that the recall is merely a precautionary measure.

A spokesperson for the company said earlier this week that six brands were affected - 2-litre Aquarius and 500ml Qoo Tottemo Orange, as well as Coca-Cola, Diet Coca-Cola, Fanta Orange and Fanta Grape bottled in 1.5-litre PET bottles.

The drinks were manufactured between 26 and 30 March at one of the group's factories in Shiga Prefecture, and sold in a total of 13 prefectures mainly in central and western Japan.

A customer alerted the company to "a substance which looks like black powder" in a bottle of Aquarius bought on 27 April, the spokesperson said. Further investigation revealed that a small amount of iron powder had mixed with the beverage due to a defect in equipment used to measure sugar and carbon dioxide in the manufacturing line.