Japonic languages in the context of "Morphological typology"

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."

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.

The classification of the Japonic languages and their external relations is unclear. Linguists traditionally consider the Japonic languages to belong to an independent family; indeed, until the classification of Ryukyuan and eventually Hachijō as separate languages within a Japonic family rather than as dialects of Japanese, Japanese was considered a language isolate.

Among more distant connections, the possibility of a genetic relationship to languages like Austronesian and or Kra–Dai, are discussed. A relation between Japonic and Koreanic is also considered plausible by some linguists, while others reject this idea. Independent of the question of a Japonic–Koreanic connection, both the Japonic and Koreanic languages are sometimes included in the now largely discredited Altaic family.

The Altaic (/ælˈteɪ.ɪk/ ) languages are a sprachbund and rejected proposed language family comprising the Turkic, Mongolic and Tungusic language families, with some linguists having included the Koreanic and Japonic families. The proposed Altaic language family is no longer considered valid, as linguistic similarities among Turkic, Mongolic, and Tungusic languages are better explained by areal convergence within a convergence zone rather than by a shared genetic lineage, a phenomenon observed cross-linguistically in diverse language families worldwide.

These languages share agglutinative morphology, head-final word order and some vocabulary. The once-popular theory attributing these similarities to a common ancestry has long been rejected by most comparative linguists in favor of language contact, although it continues to be supported by a small but stable scholarly minority. Like the Uralic language family, which is named after the Ural Mountains, the group is named after the Altai mountain range in the center of Asia.

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.

Okinawan is a Japonic language spoken on Okinawa Island. Okinawan-language documents of the Ryukyu Kingdom were written in kanji and hiragana, derived from Japan.

Although generally agreed among linguists to be a distinct language, most Japanese, as well as some Okinawans, tend to think of Okinawan as merely a regional dialect of Japanese, even though it is not mutually intelligible to monolingual Japanese speakers. Modern Okinawan is not written frequently.