Ryūkyū Kingdom 1429–1879 — a separate sovereign polity, not historic Japan
Okinawa is Japan's southernmost prefecture, but for 450 years before it was Japan it was the Ryūkyū Kingdom (Ryūkyū Ōkoku, 1429–1879) — a unified maritime kingdom centred on Shuri Castle in Naha that traded across the China Seas, paid tribute to the Ming and Qing courts in Beijing, and ran its own embassies to Edo Japan. The kingdom was unified in 1429 by King Shō Hashi, sat at the centre of the East Asia trade triangle linking Fujian, Kyushu, Korea, Siam, and Java, and was effectively annexed in two stages: a 1609 invasion by the Satsuma domain of southern Kyushu that imposed dual tributary status, then the 1879 abolition (Ryūkyū shobun) by the Meiji government that ended the kingdom and folded the islands into Japan as Okinawa Prefecture. The Ryūkyūans are recognised as a distinct ethnic group from mainland Yamato Japanese — physically, linguistically, and culturally closer to the Ainu and to coastal southern China than to Tokyo. Shuri Castle (UNESCO World Heritage 2000 as part of the Gusuku Sites and Related Properties of the Kingdom of Ryūkyū) is the physical anchor of that history; it burned to the ground in October 2019 in an electrical fire and is currently in a multi-year reconstruction (the main hall is targeted for a 2026 reopening). Walking Naha you are walking through a kingdom that was incorporated into Japan only six generations ago.
Uchinaaguchi — the Okinawan language UNESCO classifies as endangered
Uchinaaguchi (沖縄口) is the Okinawan language — not a dialect of Japanese, but a separate language within the Japonic family, mutually unintelligible with standard Japanese in its older forms. UNESCO classifies it (along with the related Kunigami, Miyako, Yaeyama, and Yonaguni languages of the Ryūkyū chain) as 'definitely endangered'. The reason is policy: from the 1879 incorporation through the post-1945 American occupation period, Tokyo and the prefectural school system actively suppressed Uchinaaguchi in favour of standard Japanese — students caught speaking it in school were made to wear hōgen fuda ('dialect placards') as punishment well into the 20th century. Today fewer than half a million people speak it with any fluency, and active first-language speakers are concentrated among Okinawans born before the 1950s. There is a slow revitalisation movement — Uchinaaguchi radio programmes, school clubs, and a growing pop-music scene that codeswitches between Japanese and Uchinaaguchi (the band Begin and the singer Cocco are reference points). Visitors will encounter Uchinaaguchi in restaurant names, awamori brand names, the lyrics of eisa drum songs, and the older signage in Naha's covered markets — a present, audible reminder that the prefecture's identity is not interchangeable with mainland Japan's.
Battle of Okinawa 1945, US occupation 1945–1972, and the 70% base burden today
The Battle of Okinawa (April–June 1945) was the largest amphibious assault of the Pacific War and the only ground battle fought on Japanese home soil. An estimated 150,000 Okinawan civilians — roughly a quarter of the prefecture's population at the time — were killed, alongside 110,000+ Japanese and 12,500+ American military personnel. Civilian deaths included mass suicides ordered or pressured by the Imperial Japanese Army, deaths in caves used as shelters, and deaths from American shelling and ground combat. The Cornerstone of Peace memorial at Mabuni in southern Okinawa carries the names of every confirmed victim, regardless of nationality. After Japan's surrender, Okinawa was placed under direct US military administration and remained under American rule for 27 years — a generation longer than mainland Japan's seven-year occupation — and was returned to Japanese sovereignty only in 1972. American sovereignty ended; the bases did not. Okinawa Prefecture today hosts roughly 70% of all US military facilities in Japan on 0.6% of Japan's land area — Kadena Air Base, Camp Hansen, Camp Foster, Marine Corps Air Station Futenma, and several others occupy a significant share of central Okinawa. The base presence is a contemporary political and social issue, not historical residue: anti-base protest, accident and crime concerns, and ongoing relocation disputes (the Henoko reclamation for the Futenma replacement facility is the live flashpoint) are part of daily Okinawan public life. Frame both the 1945 history and the current base footprint with care — for many Okinawans these are still open wounds, and they shape how the prefecture relates to Tokyo, to Washington, and to visitors.
Karate, awamori, eisa, sanshin — the cultural inheritance of the kingdom
Karate (空手, 'empty hand') was born here — the discipline evolved on the Ryūkyū Islands from indigenous fighting arts (te, 'hand', and tegumi grappling) cross-pollinated with Chinese martial systems imported through the kingdom's trade ties with Fujian. Naha-te, Shuri-te, and Tomari-te — the three regional schools named after their founding cities — were systematised in the late 19th and early 20th centuries by masters including Anko Itosu and Chōjun Miyagi, and exported to mainland Japan in the 1920s where they were standardised into the karate styles practiced globally today. Naha hosts the Okinawa Karate Kaikan (the prefecture's official karate centre, opened 2017) and a karate dōjō circuit that draws international practitioners on training pilgrimages. Awamori is the prefecture's distilled spirit — made from long-grain Thai indica rice fermented with black kōji mould native to the islands, distilled once, and aged in clay urns, sometimes for decades (kūsū awamori, aged 3+ years, is the prestige tier). Eisa is the call-and-response drum and dance tradition performed during Obon to send ancestral spirits home, with the All-Okinawa Eisa Festival in Okinawa City every August drawing 300,000+ spectators. The sanshin is the three-stringed snakeskin lute that drives Okinawan folk and pop music. And then there is the longevity inheritance — Okinawa has been studied for decades as one of the world's original 'Blue Zones', with centenarian rates historically among the highest on Earth (the rate has fallen substantially among post-1945 generations as the diet has Westernised, but the older cohort and the traditional diet — gōyā champurū, sweet potato, tofu, modest portions, ikigai as a cultural concept — remain the textbook reference for healthy aging research).