Fukushima plant releases 55,000 tonnes of nuclear wastewater in FY2025

Japan's crippled Fukushima Daiichi Nuclear Power Plant has discharged 55,011 tonnes of nuclear-contaminated wastewater into the ocean in fiscal year 2025, Tokyo Electric Power Company Holdings (TEPCO) said in a news release on Tuesday.

According to TEPCO, the plant carried out seven rounds of discharge throughout fiscal year 2025 (April 2025 to March 2026). The wastewater dumped into the ocean contained approximately 16 trillion becquerels of radioactive tritium, it stated.

The company plans to carry out eight rounds of discharge in fiscal year 2026, with a projected total volume of about 62,400 tonnes.

Despite widespread concerns and opposition from the international community, Japan unilaterally launched the discharge of nuclear-contaminated water from the plant into the ocean in August 2023. To date, a total of 18 rounds of discharge have been completed, with a cumulative volume of about 141,000 tonnes released into the sea.