Foreign Minister Toshimitsu Motegi told a parliamentary panel Friday that officials were able to contact the two after the Feb. 28 strikes and confirmed their safety. The government is "doing everything to support them, their families and others involved," Motegi said.
Motegi said he insisted on the importance of their protection and early release when he met with the Iranian ambassador this week.
The Committee to Protect Journalists has named the first detainee as Shinnosuke Kawashima, the Tehran bureau chief of Japanese public broadcaster NHK. Its report quoted an unidentified source who spoke on condition of anonymity due to fear of retribution.
CPJ said Kawashima was arrested Jan. 20 by the Islamic Revolutionary Guard Corps and was transferred Feb. 23 to Evin Prison.
The organization demanded the immediate release of Kawashima and other journalists detained for their work.