The survivors are all Japanese adult males. None were reported injured.
Patrol vessels from Miyakojima and Naha responded alongside special rescue personnel from Haneda, three of whom boarded the tug at around 15:50.
At around 16:10, they located the 65-year-old chief engineer in the engine room, unconscious and with severe burns, and confirmed that he had died at the scene.
The fire was declared extinguished at around 17:20. The coast guard has been interviewing the survivors as part of its investigation into the cause.

AloJapan.com