Highly radioactive water has leaked into the sea from Japan's stricken Fukushima nuclear reactor, according to TEPCO, the company that owns the plant.

A spokesman said up to 45,000 litres could have escaped but described that amount as small. The leak is still being investigated.

Watch the video below.  In the meantime, do you have something to say about Fukushima?  We invite submissions from investigative journalists and other writers.