Chinese people in Japan include any people self-identifying as ethnic Chinese or people possessing Chinese citizenship living in Japan. People aged 22 or older cannot possess dual-citizenship in Japan, so Chinese possessing Japanese citizenship typically no longer possess Chinese citizenship. The term "Chinese people" typically refers to the Han Chinese, the main ethnic group living in China (PRC) (including Hong Kong and Macau SARs), Taiwan (ROC) and Singapore. Officially, China (PRC) is home to 55 additional ethnic minorities, including people such as Tibetans, though these people might not self-identify as Chinese. Han Chinese people have had a long history in Japan as a minority.