Japan has failed to secure unanimous support from the Group of Seven(G7) for its planned release of radioactive water from the crippled Fukushima nuclear power plant into the ocean later this year due to opposition from Germany.

The two-day G7 ministers' meeting on climate, energy and environment wrapped up in Japan's Sapporo on Sunday, with the participants adopting a joint statement.

The statement welcomed progress in the dismantlement of the plant and Tokyo's transparent efforts to scientifically conduct the process in cooperation with the International Atomic Energy Agency(IAEA). It also expressed support for the IAEA's safety verification regarding the water release.

According to Japanese daily Asahi Shimbun on Monday, German environment minister Steffi Lemke publicly protested when Japanese economy minister Yasutoshi Nishimura said the G7 welcomed Tokyo's transparency in the process, including the water release.

Lemke referred to Germany's nuclear phase-out policy, saying her country cannot welcome Japan's release plan despite respecting its ongoing efforts.

This led the Japanese minister to acknowledge that he had wrongfully said that the G7 had specifically mentioned the water release in the statement while welcoming Tokyo's efforts.