The deceased routinely drank highly-caffeinated drinks to stay awake during his job at a 24-hour gasoline stand.
A study conducted by Fukuoka University found that a man in his 20s died of caffeine intoxication. This is the first such case reported in Japan. The death was treated as accidental, despite traces of a caffeine pill being found in his stomach, as there were no indications of foul play or a deliberate overdose, the study said.
‘Deaths from caffeine overdose are common in the US where highly-caffeinated drinks are widely available and commonly served alongside alcohol in bars.’
Japan's Health, Labour and Welfare Ministry said it was the first such case that had been reported and stated: "We had never heard of fatal caffeine intoxication." The deceased apparently routinely drank highly-caffeinated drinks to stay awake during his job at a 24-hour gasoline stand.
One company that manufactures such "energy drinks" warns against drinking numerous cans or bottles of its product and for its consumers to not mix the drink with alcohol as it may cause side effects.
In terms of caffeine consumption, Japan's Food Safety Commission, states somewhat ambiguously that three cups of coffee a day for a healthy adult and a 350-mm can of cola for children between four and six years old is an "adequate" amount.
Such drinks are also available in urban bars and clubs in Japan with vodka often being added to the drink.
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According to police reports, the deceased had returned home and slept. At some point thereafter he vomited and was rushed to hospital where he died.
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