Also some anecdata, but I think it depends so much on the person: I gained 10 kilograms by living more than a year in Japan. I ate healthily so I wasn't fat by

Also some anecdata, but I think it depends so much on the person: I gained 10 kilograms by living more than a year in Japan. I ate healthily so I wasn't fat by any means (in fact, I'm really skinny), but I ate so much that I think this is the reason I gained some weight. I ate a lot of rice (my rice portion was usually more than a Japanese person's entire plate).