Actually, it's understandable, and it's ok to take candid photos.
Usage:
The use of Japanese covers the whole of Japan (most of the Ryukyu area is used, some indigenous people use Ryukyu, and Japan does not recognize Ryukyu as an independent language).
Japanese is widely used in the world, because the Japanese animation industry has great influence in the world, although it is not the working language of the United Nations. Especially when it comes to ACG, Japanese is almost the only language.
Moxibustion therapy is an ancient method with a history of more than 2,000 years in China. Let me introduce some related knowledge to you, I hope it will be useful