The leader of Japan's Suntory Holdings beverage company will resign following allegations that he purchased illegal substances.

As the chair of Japan’s second-biggest business lobby, Takeshi Niinami has been an outspoken and influential voice in business circles.

The leader of Japan's Suntory Holdings beverage company will resign following allegations that he purchased illegal substances.

Niinami bought supplements in the belief that they were legal, says Jim Beam and Laphroaig owner

The supplements allegedly contained THC, the psychoactive component of cannabis, which is illegal in Japan.

Takeshi Niinami said he never used the products in Japan, where officials are investigating whether they are banned under the country’s strict drug laws.