Japan is part of Asia in the way that the U.K. is a part of Europe. Island nations close to the continent, sharing many things with the continent, but having its own character. Lloyd · 7 years ago. Thumbs up.est Answer: yes, it is part of asia. just because it is not part of the mainland asia (china, mongolia, etc) it is part of asia. I fyou thought that it may be part of the pacific islands, that is an easy-to-make mistake, but it is not.