Q: Does Japanese society discriminate against fat people?Yes, discrimination against obese people is certainly higher in Japan than in Western countries such as the United States, United Kingdom or France.
Japanese people are thin. The average obesity rate is just 22.6%. That's the lowest rate amongst developed countries (161st fattest country in the World). Compared to a country with a high obesity rate such as Austria (57.1%) — that's very low.
Obese people stick out more in Japan because so few people are overweight. Sticking out isn't always a bad thing. However, in some cases it might lead to discrimination.