The health ministry said Tuesday it plans to disclose more information in English about the health of workers at the Fukushima No. 1 nuclear plant amid concern about their high cumulative radiation exposure.

The ministry said it plans to upload the English version of its health guidelines for the plant workers in mid-May. It will also eventually release in English data about how much radiation the workers are exposed to every month.

"The purpose is to gain more understanding from abroad" about what is happening inside the plant, said Kaoru Tokutsu, the ministry's senior official in charge of measures to protect workers handling radiation.

Under guidelines released in October 2011, Tokyo Electric Power Co. is required to give workers regular checkups. Former workers must receive the same medical exams.

The information appears on the ministry's Japanese website but has not been translated into English.