Japan's release of contaminated water from the crippled Fukushima nuclear power plant has been carried out stably and as planned, with no abnormalities detected so far, a South Korean official said Friday.

Tokyo initiated the discharge of contaminated water a day earlier, a process expected to span more than three decades, despite lingering health and environmental concerns from neighboring countries.

"So far, the discharge is proceeding stably as originally planned, and it is understood that there are no abnormal situations," said Park Ku-yeon, the first deputy chief of the Office for Government Policy Coordination, during a daily briefing on the Fukushima issue.

Park also emphasized that the Seoul government is thoroughly monitoring and analyzing the ocean discharge process through a "double hotline" between the regulatory and diplomatic authorities of the two countries. The two sides earlier agreed to swiftly share information in case of an abnormal situation at the discharge facilities.

"The government will take its best measures to continue monitoring so that there will be no impact on people's safety and health," Park said. (Yonhap)