Japan has approved the full resumption of commercial operations at a nuclear reactor for the first time since the March quake and tsunami.

Hokkaido Electric power Co. restarted commercial operations at the Tomari plant reactor number 3, soon after receiving official approval.

The operation of about three quarters of Japan's 54 reactors has been suspended since the twin disasters sparked the Fukushima nuclear crisis, mostly for regular safety checks. But leaks of radiation, evacuation of residents and contamination of food and seawater have weakened public confidence in safety. Many host communities have been reluctant to approve their restart.

Hokkaido Electric power Co. restarted commercial operations at the Tomari plant reactor number 3, soon after receiving official approval. However, Kyodo news says its restart will make no difference to electricity output, as it was already generating electricity at full capacity under an "adjustment operation".