Suu Kyi has been under house arrest since February 2021 when a military coup ousted her elected government.
The 76-year-old Nobel laureate has been charged with a raft of criminal offences including voter fraud.
She denies all of the accusations and rights groups have condemned the court trials as a sham.
The closed-door hearings in the capital Nay Pyi Taw have been shut to the public and media, and Suu Kyi's lawyers forbidden from speaking to journalists.
On Wednesday a junta court found her guilty of taking a $600,000 (£477,000) bribe in the form of cash and gold bars from the former head of Yangon, Myanmar's largest city and region.
She was sentenced to five years in jail. Lawyers told the BBC they had not been able to meet her yet.
The latest conviction takes her total prison sentence to 11 years, as she was previously found guilty for other offences.
In December, she was convicted of inciting dissent against the military and breaking public health Covid rules. In January she was also found guilty of having contraband walkie-talkie radios in her house and breaching more Covid rules.
Suu Kyi still faces 10 other corruption charges, each carrying a maximum penalty of 15 years, as well as charges on electoral fraud and violating the official secrets act.
Her supporters say the charges have been trumped up by the junta regime to ensure Suu Kyi, who remains highly regarded in Myanmar as a democracy icon, is jailed for life.
If convicted on all her charges, she would face a total jail sentence of more than 190 years, by some estimates.
Civil rights and democracy groups, as well as the UN, have denounced the legal proceedings as a farce. Human Rights Watch has called it a "courtroom circus of secret proceedings on bogus charges".
Myanmar's military regime has dismissed such allegations, saying Suu Kyi has received fair trials and due legal process so far.
The military's violent seizure of power last February in Myanmar, also known as Burma, came months after Suu Kyi's National League for Democracy (NLD) won general elections by a landslide.
The military alleged voter fraud in the victory, however independent election observers said the elections were largely free and fair.
The coup triggered widespread demonstrations, prompting Myanmar's military to crack down on pro-democracy protesters, activists and journalists.
Suu Kyi - and many members of her party - are among more than 10,000 people who have been arrested by the junta since they seized power.
Nearly 1,800 people have been killed in the military's crackdown on dissent, according to the Assistance Association for Political Prisoners (Burma).
The chaos has also led to continued fighting. The military junta faces widespread opposition and some parts of the country are now engulfed in armed conflict.