The Myanmar community in Japan and people who have ties with the Southeast Asian country's civilian leader Aung San Suu Kyi on Monday expressed their surprise and worry over her detention by the military.

"I felt she was having a hard time but I had not realized that it was this bad," said Yoshihiro Tsubouchi, an honorary professor at Kyoto University who knew Suu Kyi from her days as a researcher at the university's Center for Southeast Asian Studies in the 1980s.

Tsubouchi, 83, said he hoped she "is not in danger."