A Gloucestershire man jailed in Japan on drugs charges starts his appeal on Thursday against conviction.
Baker's mother Iris said he was coping as best as he could in prison
Nick Baker's appeal was to have been heard in May, but it was postponed when an interpreter could not be found.
The 33-year-old, from Stroud, was jailed for 14 years, but maintains he was tricked into carrying drugs by a companion who fled and is now awaiting trial on similar charges in Belgium.
His case is being closely monitored in the UK by Fair Trials Abroad.
Mr Baker was arrested at Tokyo's Narita airport after more than 40,000 Ecstasy tablets and 2lb of cocaine
was found in a suitcase he was carrying.
At his initial trial last June, the father-of-one was also fined £25,600.
His lawyers began the appeal against his conviction at Tokyo's High Court in March.
In January, his mother, 54-year-old Iris Baker, who lives in Wiltshire, described her son as "struggling to cope" with Japanese prison life.