A government body has given up trying to arbitrate between Tokyo Electric Power Company and more than 15,000 people seeking higher monthly compensation for the 2011 Fukushima nuclear disaster.
It was the largest arbitration case involving the nuclear accident.
Namie Town in Fukushima Prefecture filed a petition with the Nuclear Damage Compensation Dispute Resolution Center in 2013, on behalf of residents who were forced to evacuate after the disaster.
More than 15,000, or about 70 percent of the town's population, signed the petition to demand more compensation from TEPCO, the operator of the damaged Fukushima Daiichi nuclear plant.
TEPCO's monthly payment for each Namie resident was calculated at 100,000 yen, or about 934 dollars.
In March 2014, the dispute resolution center offered an arbitration plan that called for raising this amount by 50 percent. The town agreed to accept it.
But TEPCO maintains that increasing the compensation would have a significant impact on other evacuees. The center has repeatedly asked the utility to accept the plan.
On Friday, the dispute resolution center told the town of its decision to end the arbitration process.
The claimants are expected to consider whether to file a lawsuit against TEPCO. The town says more than 800 of the claimants are now dead.