Language and religious features The official language of Japan is Japanese. Most of the citizens are more or less proficient in English, however, due to the accent and the mixing of English and Japanese words, their English is very difficult to understand. All signs are duplicated in English. In Japan, the two state religions are Shintoism (the original religion of Japan ), and Buddhism, which came later from China. Somehow they managed to merge into one and become almost inseparable….