The Nuclear Safety Commission of Japan made assurances Tuesday over the safety of using plutonium-uranium mixed oxide, or MOX, fuel at nuclear plants.

It recommended that safety measures at plants be stepped up in an effort to ease public concerns about safety that have so far prevented the fuel's debut in Japan.

In a white paper on nuclear safety, the commission affiliated with the Cabinet Office also effectively conceded that the lack of a cohesive safety inspection system was to blame for an accident in November at the Hamaoka nuclear plant in Shizuoka Prefecture.