Theories of origins Archaeological evidence indicates that
Stone Age people lived in the Japanese archipelago during the
Paleolithic period between 39,000 and 21,000 years ago. Japan was then connected to mainland
Asia by at least one land bridge, where
nomadic
hunter-gatherers crossed to Japan.
Flint tools and bony implements of this era have been excavated in Japan. In the 18th century,
Arai Hakuseki suggested that the ancient
stone tools in Japan were left behind by the
Shukushin. Later,
Philipp Franz von Siebold argued that the
Ainu people were
indigenous to northern Japan.
Iha Fuyū suggested that Japanese and
Ryukyuan people have the same ethnic origin, based on his 1906 research on the
Ryukyuan languages. In the
Taishō period,
Torii Ryūzō claimed that
Yamato people used Yayoi pottery and Ainu used Jōmon pottery. However, Kazuro Hanihara announced a new
racial admixture theory in 1984 According to Hanihara, modern Japanese lineages began with
Jōmon people, who moved into the
Japanese archipelago during
Paleolithic times, followed by a second wave of immigration, from
East Asia to Japan during the Yayoi period (300 BC). Following a population expansion in
Neolithic times, these newcomers then found their way to the Japanese archipelago sometime during the Yayoi period. As a result, replacement of the hunter-gatherers was common in the island regions of
Kyushu,
Shikoku, and southern
Honshu, but did not prevail in the outlying
Ryukyu Islands and
Hokkaido, and the Ryukyuan and Ainu people show mixed characteristics.
Mark J. Hudson claims that the main ethnic image of Japanese people was biologically and linguistically formed from 400 BCE to 1,200 CE. However, some recent studies have argued that the
Jōmon people had more ethnic diversity than originally suggested or that the people of Japan bear significant genetic signatures from three ancient populations, rather than just two.
Jōmon and Yayoi periods Some of the world's oldest known
pottery pieces were developed by the
Jōmon people in the
Upper Paleolithic period, dating back as far as 16,000 years. The name means "cord-impressed pattern", and comes from the characteristic markings found on the pottery. The Jōmon people were mostly hunter-gatherers, but also practiced early agriculture, such as
Azuki bean cultivation. At least one middle-to-late Jōmon site (, –1000 BC) featured a primitive rice-growing
agriculture, relying primarily on fish and nuts for protein. The ethnic roots of the Jōmon period population were heterogeneous, and can be traced back to ancient
Southeast Asia, the
Tibetan Plateau, ancient
Taiwan, and
Siberia. Beginning around 300 BC, the
Yayoi people originating from Northeast Asia entered the Japanese islands and displaced or intermingled with the Jōmon. The Yayoi brought
wet-rice farming and advanced
bronze and
iron technology to Japan. The more productive
paddy field systems allowed the communities to support larger populations and spread over time, in turn becoming the basis for more advanced
institutions and heralding the new
civilization of the succeeding
Kofun period. The estimated population of Japan in the late Jōmon period was about eight hundred thousand, compared to about three million by the
Nara period. Taking the growth rates of hunting and agricultural societies into account, it is calculated that about one-and-a-half million immigrants moved to Japan in the period. According to several studies, the Yayoi created the "Japanese-hierarchical society".
Consolidation and feudal periods Colonial period During the
Japanese colonial period of 1895 to 1945, the phrase "Japanese people" was used to refer not only to residents of the Japanese archipelago, but also to people from colonies who held Japanese
citizenship, such as
Taiwanese people and
Korean people. The official term used to refer to ethnic Japanese during this period was . Such linguistic distinctions facilitated forced
assimilation of colonized ethnic identities into a single Imperial Japanese identity. After the end of World War II, the
Soviet Union classified many
Nivkh people and
Orok people from southern
Sakhalin, who had been Japanese imperial subjects in
Karafuto Prefecture, as Japanese people and repatriated them to
Hokkaido. On the other hand, many
Sakhalin Koreans who had held Japanese citizenship until the end of the war were left
stateless by the Soviet occupation. ==Language==