More than 7 out of every 10 South Koreans are opposed to Japan's release of treated radioactive water from the crippled Fukushima nuclear power plant, a public opinion poll showed.

The survey conducted on 1,000 South Korean adults on Aug. 22-23 by Research View showed 72.4 percent objecting to the discharge, while 20.4 percent were in support.

Two civic groups, the Asian Citizen's Center for Environment and Health and the Korean Federation for Environmental Movement, commissioned and released the poll.

On Aug. 24, Japan began discharging the radioactive water, which has been stored at the nuclear power plant since three nuclear reactors melted down in the wake of a powerful earthquake in March 2011, into the ocean.

A total of 78.3 percent of the respondents said the South Korean government should ban imports of all seafood from Japan. (Yonhap)