
Keiichi Wada, 25, was pronounced dead at 9 pm at Chulalongkorn Hospital, four days after the fire at the Santika Club on Ekamai Road.
As of Monday, 68 of the injured victims were still receiving treatment in various hospitals, 35 in intensive care units.
Po Gen Jongrak Jutanont, Deputy National Police Commissioner, said the investigators had interviewed survivors to establish the cause of the blaze, which was yet to be concluded.
Police did not rule out the possiblility that the cause of the fire could have been caused by either stage effects used by the club, or fireworks lit by a customer, Gen. Jongrak said.
Suriya Rit-rabue, managing director of White & Brothers (2003) Co and registered owner of the pub, will face charges of recklessly causing other people's deaths and allowing customers aged under 20 into the pub, as a 17-year-old high school student was found among the dead, Jongrak said.