A large part of the new funding announced by the Japanese government will go towards freezing the ground around the Fukushima nuclear plant to contain the leak, according to local press reports.
The process, which is expected to cost 32 billion yen, will involve burying vertical pipes in the ground around the plant and pumping refrigerant through them.
Around 15 billion yen will go towards treating the contaminated water being stored at the plant.
More top news
Spring takes a hike - for the time being
A number of Britons are feared stranded on Mount Everest after the Nepal earthquake triggered a deadly avalanche on Saturday.
Prime Minister defends royals' decision to give birth in a private hospital - instead of going with the NHS