Entertainer Masashi Tashiro was found guilty Wednesday of using and possessing illegal stimulants last November.
The Sendai District Court sentenced Tashiro to 30 months in prison, six months of which were suspended for two years with probation for rehabilitation purposes.
According to the ruling, Tashiro, 63, possessed cannabis and illegal stimulants at his condominium in Tokyo on Nov. 6, the day of his arrest, and used the stimulants around that time.
Prosecutors had sought 42 months in prison for Tashiro on charges of drug possession, while his defense team had asked for a suspended sentence with probation.
He admitted to the charges during the first hearing of his trial on Feb. 13.
His suspected drug possession came to light after an accommodation facility in Miyagi Prefecture where Tashiro had stayed informed police that "a customer forgot weird stuff" on Aug 24.
Tashiro debuted in the entertainment industry in the 1980s as a doo-wop singer with The Chanels and later became a popular comedian.
Following a series of arrests on drug charges, he was involved in activities to raise public awareness about drugs and the difficulty of recovering from addiction, appearing on television to speak on the topic in July.