A Japanese patrol ship ran aground off Niigata Prefecture on Wednesday morning and became unable to sail, the coast guard said, adding that no crew members were injured but spilled oil was observed in the area.While the coast guard is investigating the cause of the incident, which occurred around 6:30 a.m. off Kashiwazaki, its local office said there may have been a human error in the maneuvering of the 3,100-ton Echigo.Yusuke Ono, head of the Niigata Coast Guard Office, told a press conference that the accident occurred when the 105-meter-long ship was approaching a lighthouse to check tha…READ FULL ARTICLE