A Japanese Self-Defence Force ship and a leisure fishing boat collided off the coast of Hiroshima in western Japan, leaving two of the fishing boat's crew in critical condition, the country's defence minister said on Wednesday, according to Reuters. The fishing boat, with four crew, capsized after the collision with the vessel "Osumi" at around 8 a.m. (2300 GMT). The cause of the collision is still being investigated, the Japanese Coast Guard said. "This accident is very regrettable," Defence Minister Itsunori Onodera told an emergency news conference after the accident, pledging full cooperation and help with the probe.