Actually Japan is more part of china than any other countries. Japan was 屬國 of china. :-) (倭 / 漢委奴國王 /親魏倭王/大明藩屬日本國王/日本国王,臣源义满 / etc...) 漢倭奴國王. this is scientific archaeologically first kingdom of japan. it mean branch state of Han chinese. Japan start from 奴(slave) country of china. China give japan country name as ’奴婢國家,奴婢民族=倭奴國(slave state)’. don’t forget. 日本 was 中華下級屬國奴婢國家. Japanese culture 茶道,插花,劍道,漢字,吳服,唐手,相撲,奈良 are all derived from China. ’japanese kimono’ is copy of Chinese hanfu. Ninja invented by china. (荊軻) ’Japanese zen’ is copy of Chinese 禪. ’Japanese go’ is copy of Chinese 围棋 Japanese food ’ramen’ invented by china. Japanese ’Soy sauce’ invented by china. karate was carbon copy of chinese Tang dynasty martial arts. also, Japan’s major religion, goverment system, wrting character, they are same with china. so, japan is more part of china. Japanese emperor system("tenno") is very similar with china dynasty "皇帝, 天子". Japanese major religion "buddhism" is very similar with chinese buddhism. nowdays, japan is only one country use chinese character "kanji". (religion, goverment system, wrting character) they are same with china. (1) Japan was 屬國 of China.(中華下級屬國奴婢國家) (2) All Japanese culture derived from China. (3) Religion, Goverment system, Wrting character(kanji) are same with china. Therefore, Japan is a Part of china.