The Ainu originally inhabited all islands of present day Japan as well as southern Sakhalin which is part of Russia. Hunters gatherers who lived in autonomous villages they were gradually disenfranchised by the Japanese.
A good example of asymmetrical design. All styles of robes have at least some examples of asymmetrical designs. However, most examples are much more subtle. - The Ainu and Their Culture: A Critical Twenty-First Century Assessment :: JapanFocus