Japan’s Chemical Safety Board has released its annual report on the chemical poisoning and death of pilots.
The report, released on Wednesday, has been delayed until February 15, 2020.
The board is due to meet in March, but will not be held in Tokyo due to the typhoon.
A government spokesman said there was no timetable on when the report will be released.
A report by the National Toxicology Agency in December said that pilots were exposed to a class B, class C, and class D toxicant, benzene, when they took the toxic drug naloxone, which reverses the effects of opioid overdose.
The National Institute of Occupational Safety and Health (NIIHS) has issued two separate safety alerts about the potential dangers of benzene and nalaxone, but the board has yet to issue a warning on either.
A spokeswoman for the National Institute for Occupational Health and Safety (NIOH) told Reuters news agency the safety of nalactone is still being assessed.
The board said it was studying how the drug might affect people’s reactions to benzene.