Japanese nationality law in the context of "Koseki"

Chinese people in Japan (Japanese: 中華系日本人, Hepburn: Chūka-kei Nihon-jin) include any Japanese individuals self-identifying as ethnic Chinese or Chinese permanent residents 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.

Among the several native ethnic groups of Japan, the predominant group are the Yamato Japanese, who trace their origins back to the Yayoi period and have held political dominance since the Asuka period. Other historical ethnic groups have included the Ainu, the Ryukyuan people, the Emishi, and the Hayato; some of whom were dispersed or absorbed by other groups. Ethnic groups that inhabited the Japanese islands during prehistory include the Jomon people and lesser-known Paleolithic groups. In more recent history, a number of immigrants from other countries have made their home in Japan. According to census statistics in 2018, 97.8% of the population of Japan are Japanese citizens, with the remainder being foreign nationals residing in Japan. The number of foreign workers has been increasing dramatically in recent years, due to the aging population and the lack of labor force. A news article in 2018 states that approximately 1 out of 10 young people residing in Tokyo are foreign nationals.