Unless you have been to Japan, and have frequented its many beaches, you really do not know. The junk press rarely gets it right. I am here to tell you that Japanese women wear it and bare it all here. They wear thongs, t-backs, two pieces, and one piece. For the most part, they are not ashamed. Surveys that claim otherwise may be focusing on a very limited group of women, and that also includes the pathological liars who have no idea whether they are telling the truth or not.
In Western societies like the U.S.A., we are a nation of fat people with anorexic standards. We promote junk food and overnight diet fads that wind up making us fatter and less healthy. Americans remember the weight loss drug "fin fin, " we remember the claims it made about weight loss and the subsequent disastrous side-effects. Japanese women in general avoid drug use of any kind for weight loss. They tend to focus more on either starving themselves, or eating healthier food in very limited quantity. Some even try these cute and absurd little diets that provide only small results. The truth is that most Japanese women look very good in a bikini despite them having mostly underdeveloped bodies. What I mean by that is they have a good midriff and look very natural with a one or a two piece.
Most American women despise and resent women with perfect bodies, not admire them. Hollywood does a good job of promoting rather un-American looking women because in reality few women have absolutely exceptional bodies while the rest do not. Again, that's a Hollywood standard. Having rather large and shapely buttocks and perfectly shaped breast is regarded as beautiful. Some guys claim that small breast and shapely rear-ends are hot, but in reality medium to large and shapely buttocks are what is hot along with a pair of modest C cup sized breast. Having good midriff is also absolutely essential, too, but in order to achieve that, some American women, most in vain, go to the gym and do high-intensity workouts. They go on a low-carb high protein diet regiment for three months and lose all of their weight and then rebound. In reality, although most American women do not have summer bodies, many flaunt the fact on public beaches without shame. Japanese women aren't that into the Atkins craze. Big and beautiful has been gaining popularity, especially in some popular men's magazines and amongst a growing number of men who find larger women more beautiful.
In contrast, in Japan, it is frowned upon to show that much development. For a Japanese woman to flaunt that much form and shape is culturally unacceptable as many Japanese men feel a sense of intimidation around a fully matured Japanese woman. The media in Japan does a horrible job of portraying women on television with underdeveloped bodies, many who are flat and formless receive enormous attention and are idolized as "cool" and "beautiful." "Forever 21" is a slogan used by fashionistas who promote eternal youth and beauty. If you wear clothes that make you look young you will be young, forever. Cute pastels and children's clothes outsell adult clothes here in Japan, as do adult diapers and girls panties. People here in Japan do not know how to accept that they get old and need to move on, they are stuck in this fantasy of wanting to be young, thin, and beautiful, even clear into their sixties. This is probably why companies like Gap and Uniqlo are so popular with older women in Japan.
Efforts to reshape perceptions of feminine beauty have all gone in vain in recent years. I recall two television celebrities in Japan who go by the name "Kano Sisters," a sister duo that flaunts a completely different kind of beauty that is culturally and uncharacteristically Japanese. The two are sort of provocateurs who flaunt mature beauty in a much healthier light. "It is okay to be a fully developed woman" and "it's okay to live life to the fullest" are some of the impressions I take from what they do on television. Not all Japanese agree with how they present themselves.
Finally, Japanese women, in general, have no problem flaunting their stuff regardless of what surveys may say. But I do sense that there is a growing culture of prudery in Japan. It is still rather benign, though. Things for the most part, are looking up and you don't have to worry about there not being enough skin to see in the summer.