Seems like a variant of culture shock[1] which has similar characteristics. The difference being the degree of anxiety experienced seems to be particularly acut

Seems like a variant of culture shock[1] which has similar characteristics. The difference being the degree of anxiety experienced seems to be particularly acute for a minority of Japanese tourists in Paris. Anthropologists and ethnographers are trained in, and can experience severe culture shock since their goal is often immersion to learn more about a culture. Panic attacks in severe cases of culture shock are not uncommon, one of my professors did a stint in Spain and lost it when she saw a slaughtered pig being carried through a market place. She described being short of breath, and other classic symptoms of a panic attack. Another instance I know of is a Japanese American female anthropologist being immersed into Japanese culture while staying as a guest at a family. She found herself panicking at the supermarket. After nearly a year there, dressed in "homewear" with a stroller and the family's children looking to buy food to make for the night's dinner, in the midst of the crushing social obligations she had such an identity crisis right then and there that she abandoned ship and moved in with a friend she knew in Tokyo. She still finished her book, which is really good. [1] https://en.wikipedia.org/wiki/Culture_shock https://en.wikipedia.org/wiki/Culture_shock