TOKYO (REUTERS) - Japan on Tuesday (Nov 16) distanced itself from a visit to Myanmar by its special envoy during which, according to military-run media in Myanmar, he played a role in the release from jail of American journalist Danny Fenster.

Mr Fenster, 37, the managing editor of magazine Frontier Myanmar, was freed on Monday three days after being sentenced to 11 years for incitement and violations of laws on immigration and unlawful assembly.

He had been detained since May, spurring an international campaign for his release that has highlighted the plight of media in the South-east Asian nation roiled by internal strife since a military takeover in February threw it into chaos.

Myanmar's military-owned Myawaddy TV said on Monday that Mr Fenster had been granted an amnesty following requests from former United States state governor and diplomat with longstanding Myanmar ties Bill Richardson, who has been openly linked with the release effort.

But, in a surprise, it also credited for the release Mr Yohei Sasakawa, the chairman of the Nippon Foundation who doubles as Japan's special envoy on Myanmar for national reconciliation, as well as former Japanese minister Hideo Watanabe.

Both Mr Sasakawa and Mr Watanabe have for years cultivated close ties to the Myanmar military.

Mr Sasakawa met coup leader Min Aung Hlaing over the weekend, but his Nippon Foundation declined to comment on the talks, citing political sensitivity.

Myawaddy TV said Mr Fenster was released in response to requests by Mr Sasakawa, Mr Watanabe and Mr Richardson to "maintain the friendship between the countries and to emphasise humanitarian grounds".

Japan's Foreign Minister Yoshimasa Hayashi, asked at a news conference about the reports of Mr Sasakawa's involvement in the journalist's release, said the envoy was on a week-long visit to Myanmar in a personal capacity.

Mr Hayashi said he was aware of Mr Sasakawa's meeting with General Min Aung Hlaing but said the visit "was not carried out in his capacity as the government representative" and his ministry was not involved in arranging it.

"The government has traditionally maintained a level of contact with Mr Sasakawa, but I would like to refrain from making the details of these communications public," said Mr Hayashi.

He did not refer to Mr Fenster's release but said Japan would continue its efforts towards improving and resolving the situation in Myanmar, including considering humanitarian aid in coordination with international agencies.

The office of Mr Watanabe's Japan-Myanmar Association declined to comment.

In recent years Mr Watanabe has been key to creating a special economic zone close to Myanmar's main city of Yangon that helped spur Japanese investment.

Mr Sasakawa's talks came amid a breakdown n a South-east Asian peace process that Myanmar's neighbours say the junta has failed to follow, which led to the unprecedented decision to exclude Min Aung Hlaing from a regional summit last month.

Central to the decision was the military's refusal to grant a special Southeast Asian envoy access to the detained leader of Myanmar's ousted government, Nobel peace prize laureate Aung San Suu Kyi.

It was unclear whether Mr Sasakawa had asked to meet Ms Suu Kyi or made any other conditions ahead of his talks with the isolated junta chief.

Myanmar's main state-run newspaper reported the meeting on its front page, using Mr Sasakawa's full title as Japan's envoy.

During his trip, Mr Sasakawa also met Myanmar's health minister, state media said, to discuss "conditions for Japan to donate Covid-19 vaccine to Myanmar, and issues that can be done to improve Japan-Myanmar relations".

Mr Sasakawa also travelled to the northwestern Rakhine region riven by ethnic tensions where, according to media, he said that he had told junta officials his foundation would donate US$8.5 million (S$11.5 million) for internally displaced people.

Media also said Mr Sasakawa promised a donation of US$3 million-worth of Covid-19 vaccines for Myanmar. It was not clear whether the vaccines would be provided by the foundation or the government of Japan.

Mr Hayashi did not directly address the question of any vaccine donation.

According to rights group Assistance Association for Political Prisoners, 10,143 people have been arrested since the coup in Myanmar and 1,260 people killed in violence, most of them in a crackdown by security forces on protests and dissent.