Traces of radiation have been detected in Japanese baby formula, leading to the first recall of a baby food product following the nation's nuclear plant meltdown in March.

Tokyo-based Meiji Co. is recalling 400,000 cans of its powered milk for infants that were manufactured in March and April and have expiration dates of October 2012.

Levels of radioactive cesium found in the baby formula were lower than government-set safety limits, the company said, so the recall is just a precaution. Babies won't be harmed by it, even if they drank the formula every day, company officials added.

The product makes up about 40 percent of baby formula sales.

Rice, fish, beef, and milk have also reportedly been affected by radiation following the disaster, when radiation spewed into the air, water, and soil, after the core of the Fukushima Daiichi nuclear power plant overheated following the earthquake and tsunami that struck on March 11.

Not all foods in Japan are monitored for possible radiation. Many manufacturers are voluntarily reporting and recalling affected products -- including the baby formula recall issued by Meiji.

The Japanese government is currently reviewing its food safety and radiation standards.