The Osaka Municipal Transportation Bureau revealed this week that two of its subway train drivers had tested positive for illegal substances.
The bureau tested all staff after it came to light that an Osaka city bus driver was arrested after testing positive for illegal drugs in August.
According to a Jiji report, the men, aged 38 and 40, tested positive for different substances. Both men deny taking the drugs, claiming to have no memory of having done so.
The Osaka Municipal Transportation Bureau reported their findings to the police, who visited the men at their workplace in Nakamozu and subjected them to a second drug test. Both men tested negative. The bureau said it plans to take the initial results seriously and plans to remove the drivers from duty and punish them accordingly.