Festivals in Japan are different than those in my country, very different. There is a feeling of community or even family in Japan that is very different than in my country. In Japan, people put their heart and soul into these matsuries, where in America, it is just another day. When I go to a まつり in Japan, I get a strong feeling of history and culture, not so in my country.
Japan (or also many other Asian countries) has differrent social structure from Western. As for the aspect of "Rural sociology", it has very important 2 concepts "Ie(=イエ; family)" and "Mura(=ムラ; village,community)". As you may know aggregation of Ie constructs Mura, but it's much more complicated stuff than Americans'. E.g. In this society, people give more emphasis to Ie rather than individuals. I wish I had proper documents for you :(
Anyway,
As for まつり, it aims to thank for harvests, hapiness, peace and well-being of all villagers (kinda similar to thanks giving), so we take the tutelary god out for a ride (on the portable shrine), making the god happy. I think you can see and feel that kind of atomosphere clearly in a small village.
I think Native Americans held festivals similar to Japanese ones. what do you think?
Native Americans had celebrations, but very different than in Japan. I know it is said that during the autumn harvest festivals, the heavens are empty of gods because they are all on earth. The biggest difference I see in festivals (おまつり) {not just autumn festivals} between Japan and the USA is the feeling. In Japan, there is a feeling of community and belonging. In the US, there are no such feelings. A festival in the US is a business adventure. Sometimes it involves entertainment, but most are purely business and there is no community feeling.
In Japan, there is a great group conciousness that is seen in all aspects of life, from the schools to the workplace to friends circles to the family. This group conciousness does not allow others to enter the group except in special occasions (they are closed). Many people are members of many groups. With this group conciousness, the individuals feelings are not important, or at not as important as the group feelings. I think this is part of the "Mura" or villiage feeling. You need not document what you said, I know of this feeling and way of life in Asia, but if you feel the desire to elaborate, please do.