Ryukyuan languages in the context of "Proto-Japonic"

Japanese (日本語, Nihongo; [ɲihoŋɡo] ) is the principal language of the Japonic language family spoken by the Japanese people. It has around 123 million speakers, primarily in Japan, the only country where it is the national language, and within the Japanese diaspora worldwide.

The Japonic family also includes the Ryukyuan languages and the variously classified Hachijō language. There have been many attempts to group the Japonic languages with other families such as Ainu, Austronesian, Koreanic, and the now discredited Altaic, but none of these proposals have gained any widespread acceptance.

The Ryukyuans are a Japonic-speaking East Asian ethnic group indigenous to the Ryukyu Islands, which stretch from the island of Kyushu to the island of Taiwan. In Japan, most Ryukyuans live in the Okinawa Prefecture or Kagoshima Prefecture. They speak the Ryukyuan languages, one of the branches of the Japonic language family along with the Japanese language and its dialects.

The United Nations Human Rights Committee in 2008 recommended that Japan, "should expressly recognize the Ainu and Ryukyu/Okinawa as indigenous peoples in domestic legislation, adopt special measures to protect, preserve, and promote their cultural heritage and traditional way of life, and recognize their land rights." The Japanese government has not accepted this recommendation because recognizing, "the Ryukyuan as Indigenous Peoples [would require Japan] to adhere to international law, thus prohibiting military bases on [Ryukyuan] land."

Japonic or Japanese–Ryukyuan (Japanese: 日琉語族, romanized: Nichiryū gozoku) is a language family comprising Japanese, spoken in the main islands of Japan, and the Ryukyuan languages, spoken in the Ryukyu Islands. The family is universally accepted by linguists, and significant progress has been made in reconstructing the proto-language, Proto-Japonic. The reconstruction implies a split between all dialects of Japanese and all Ryukyuan varieties, probably before the 7th century. The Hachijō language, spoken on the Izu Islands, is also included, but its position within the family is unclear.

Most scholars believe that Japonic was brought to the Japanese archipelago from the Korean peninsula with the Yayoi culture during the 1st millennium BC. There is some fragmentary evidence suggesting that Japonic languages may still have been spoken in central and southern parts of the Korean peninsula (see Peninsular Japonic) in the early centuries AD.

The small group of Hachijō dialects (八丈方言, Hachijō hōgen), natively called Shima Kotoba (島言葉; [ɕima kotoba], "island speech"), are, depending on classification, either the most divergent form of Japanese, or comprise a branch of Japonic languages (alongside mainland Japanese, Northern Ryukyuan, and Southern Ryukyuan). Hachijō is currently spoken on two of the Izu Islands south of Tokyo (Hachijō-jima and the smaller Aogashima) as well as on the Daitō Islands of Okinawa Prefecture, which were settled from Hachijō-jima in the Meiji period. It was also previously spoken on the island of Hachijō-kojima, which is now abandoned. Based on the criterion of mutual intelligibility, Hachijō may be considered a distinct Japonic language, rather than a dialect of Japanese.

Hachijō is a descendant of Eastern Old Japanese, retaining several unique grammatical and phonetic features recorded in the Azuma-dialect poems of the 8th-century Man'yōshū and the Fudoki of Hitachi Province. Hachijō also has lexical similarities with the dialects of Kyushu and even the Ryukyuan languages; it is not clear if these indicate that the southern Izu islands were settled from that region, if they are loans brought by sailors traveling among the southern islands, or if they might be independent retentions from Old Japanese.

Okinawan (沖縄口, ウチナーグチ, Uchinaaguchi, [ʔut͡ɕinaːɡut͡ɕi]), or more precisely Central Okinawan, is a Northern Ryukyuan language spoken primarily in the southern half of the island of Okinawa, as well as in the surrounding islands of Kerama, Kumejima, Tonaki, Aguni and a number of smaller peripheral islands. Central Okinawan distinguishes itself from the speech of Northern Okinawa, which is classified independently as the Kunigami language. Both languages are listed by UNESCO as endangered.

Though Okinawan encompasses a number of local dialects, the Shuri–Naha variant is generally recognized as the de facto standard, as it had been used as the official language of the Ryukyu Kingdom since the reign of King Shō Shin (1477–1526). Moreover, as the former capital of Shuri was built around the royal palace, the language used by the royal court became the regional and literary standard, which thus flourished in songs and poems written during that era.

Kunigami or Northern Okinawan (山原言葉, ヤンバルクトゥーバ, Yanbaru Kutūba) is a Ryukyuan language of Northern Okinawa Island in Kunigami District and city of Nago, otherwise known as the Yanbaru region, historically the territory of the kingdom of Hokuzan.

The Nakijin dialect is often considered representative of Kunigami, analogous to the Shuri-Naha dialect of Central Okinawan. The number of fluent native speakers of Kunigami is not known. As a result of Japanese language policy, the younger generation mostly speaks Japanese as their first language.

The dialects (方言, hōgen) of the Japanese language fall into two primary clades, Eastern (including modern capital Tokyo) and Western (including old capital Kyoto), with the dialects of Kyushu and Hachijō Island often distinguished as additional branches, the latter perhaps the most divergent of all. The Ryukyuan languages of Okinawa Prefecture and the southern islands of Kagoshima Prefecture form a separate branch of the Japonic family, and are not Japanese dialects, although they are sometimes referred to as such.

Japan with its numerous islands and mountains has the ideal setting for developing many dialects.