The trial of a Japanese man has begun in Myanmar over his alleged involvement in an anti-coup protest amid calls from Japan's government for his early release, Myanmar's ruling military said Tuesday.

Documentary filmmaker Toru Kubota, detained in a Yangon prison, has been charged with sedition and violating the immigration law.

"Legal action was taken against Toru Kubota for his involvement in a protest in Yangon on July 30, and the proceedings are ongoing," the military said in a brief statement.

Riot police arrest anti-coup protesters on Feb. 27, 2021, in Yangon, Myanmar. (Getty/Kyodo)

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The Japanese government has urged the junta to release Kubota as soon as possible but the decision will be made by the relevant court, according to the military.

Despite a request by the Japanese Embassy in Myanmar for a meeting with Kubota, it has yet to be realized, according to the embassy.

The embassy quoted a prison official as saying the prison does not see any problems with Kubota's health.

Local media have reported Kubota was detained along with two Myanmar people while filming a protest in the South Dagon Township area of the country's largest city.

Kubota entered Myanmar last month from neighboring Thailand on a tourist visa and contacted protesters regarding where they would gather for a demonstration.

Myanmar has been under military rule since a coup in February 2021 that toppled the democratically elected government of civilian leader Aung San Suu Kyi.