A former interpreter was sentenced on Thursday to nearly five years in prison for stealing $17m from Los Angeles Dodgers star Shohei Ohtani to pay off gambling debts, according to local media reports.

Ippei Mizuhara, the one-time translator and de facto manager of Ohtani, was sentenced to four years and nine months in prison, the punishment prosecutors had sought, and also ordered by US district judge John Holcomb to pay restitution of over $18m, the City News Service reported.

Mizuhara, 39, pleaded guilty to felony bank fraud and subscribing to a false tax return last year, according to his plea deal previously filed in US district court in Los Angeles.