The are a network of eighteen observation platforms and

beacons A beacon is an intentionally conspicuous device designed to attract attention to a specific location. A common example is the lighthouse, which draws attention to a fixed point that can be used to navigate around obstacles or into port. More mode ...

dating to the early

Edo period The or is the period between 1603 and 1867 in the history of Japan, when Japan was under the rule of the Tokugawa shogunate and the country's 300 regional '' daimyo''. Emerging from the chaos of the Sengoku period, the Edo period was character ...

and located in the

Sakishima Islands The (or 先島群島, ''Sakishima-guntō'') ( Okinawan: ''Sachishima'', Miyako: ''Saksїzїma'', Yaeyama: ''Sakїzїma'', Yonaguni: ''Satichima'') are an archipelago located at the southernmost end of the Japanese Archipelago. They are part ...

Okinawa Prefecture is a prefecture of Japan. Okinawa Prefecture is the southernmost and westernmost prefecture of Japan, has a population of 1,457,162 (as of 2 February 2020) and a geographic area of 2,281 km2 (880 sq mi). Naha is the capital and largest cit ...

, Japan. Erected in 1644 by the government of the

Ryūkyū Kingdom The Ryukyu Kingdom, Middle Chinese: , , Classical Chinese: (), Historical English names: ''Lew Chew'', ''Lewchew'', ''Luchu'', and ''Loochoo'', Historical French name: ''Liou-tchou'', Historical Dutch name: ''Lioe-kioe'' was a kingdom in t ...

at the instigation of the Satsuma overlords, at a time of international tension during the transition between the

Ming The Ming dynasty (), officially the Great Ming, was an imperial dynasty of China, ruling from 1368 to 1644 following the collapse of the Mongol-led Yuan dynasty. The Ming dynasty was the last orthodox dynasty of China ruled by the Han pe ...

and the

Qing The Qing dynasty ( ), officially the Great Qing,, was a Manchu-led imperial dynasty of China and the last orthodox dynasty in Chinese history. It emerged from the Later Jin dynasty founded by the Jianzhou Jurchens, a Tungusic-speak ...

Dynasties of

China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's List of countries and dependencies by population, most populous country, with a Population of China, population exceeding 1.4 billion, slig ...

, the beacons were responsible for monitoring and reporting on maritime traffic, with a view to restricting foreign vessels in accordance with the Tokugawa policy of ''

sakoku was the isolationist foreign policy of the Japanese Tokugawa shogunate under which, for a period of 265 years during the Edo period (from 1603 to 1868), relations and trade between Japan and other countries were severely limited, and nearly a ...

'', i.e. national seclusion. After an initial survey by the Council for the Protection of Cultural Properties in 1993, due to uncertainties over land rights and difficulties of coordination between the involved

municipalities A municipality is usually a single administrative division having corporate status and powers of self-government or jurisdiction as granted by national and regional laws to which it is subordinate. The term ''municipality'' may also mean the ...

, it was not until 2007 that they were jointly designated an

Historic Site A historic site or heritage site is an official location where pieces of political, military, cultural, or social history have been preserved due to their cultural heritage value. Historic sites are usually protected by law, and many have been rec ...

Locations

There are eight beacons in the

Miyako Islands The (also Miyako Jima group) are a group of islands in Okinawa Prefecture, Japan, belonging to the Ryukyu Islands. They are situated between the Okinawa Island and Yaeyama Islands. In the early 1870s, the population of the islands was esti ...

and ten in the

Yaeyama Islands The Yaeyama Islands (八重山列島 ''Yaeyama-rettō'', also 八重山諸島 ''Yaeyama-shotō'', Yaeyama: ''Yaima'', Yonaguni: ''Daama'', Okinawan: ''Yeema'', Northern Ryukyuan: ''Yapema'') are an archipelago in the southwest of Okinawa P ...

. Of those in the Miyako Islands, five are within the city of

Miyakojima is the largest and the most populous island among the Miyako Islands of Okinawa Prefecture, Japan. Miyako Island is administered as part of the City of Miyakojima, which includes not only Miyako Island, but also five other populated islands. ...

(on the islands of

, Ikema, and Kurima), and three in the village of Tarama (on the islands of Tarama and

Minna Minna is a city in Middle Belt Nigeria. It is the capital city of Niger State, one of Nigeria's 36 federal states. It consists of two major ethnic groups: the Gbagyi and the Nupe. History Archaeological evidence suggests settlement in th ...

). Of those in the Yaeyama Islands, two are within the city of Ishigaki (on the island of Ishigaki), seven in the town of

Taketomi is an island in the town of Taketomi, within Yaeyama District of Okinawa Prefecture, Japan. Taketomi is one of the Yaeyama Islands. The population of Taketomi Island was 323 as of January 2012. Geography Taketomi Island is located south of Is ...

(on the islands of

, Kuroshima, Upper and Lower Aragusuku,

Hateruma Hateruma (波照間島; ''Hateruma-jima''; Yaeyama: ''Patirooma'', Hateruma dialect: ''Besїma'' "our island", Okinawan: ''Hatiruma'', Northern Ryukyuan: ''Patara'') is an island in the Yaeyama District of Okinawa Prefecture, Japan. It is t ...

, Kohamajima, and

Hatoma Hatoma (鳩間島, ''Hatoma-jima''; Yaeyama: ''Patuma''; Okinawan: ''Hatuma'') is a small island of the Yaeyama Islands, barely 1 kilometer in diameter. It is under the administration of Taketomi District, Okinawa Prefecture, Japan. In local ...

), and one in the town of

Yonaguni , one of the Yaeyama Islands, is the westernmost inhabited island of Japan, lying from the east coast of Taiwan, between the East China Sea and the Pacific Ocean proper. The island is administered as the town of Yonaguni, Yaeyama Gun, O ...

(on the island of

Operations

Records suggest that the beacon near Cape Hirakubo on Ishigaki was at one point manned by a team of four, who also slept on the site. A different signal may have been given depending upon the origin of the ships. A restaged beacon relay in November 2007 saw an attempt to pass signals along two routes: (1)

- Aragukusu (Shimoji)- Aragusuku (Kamiji)- Kuroshima-

- Ishigaki; and (2)

- Kohamajima-

- Ishigaki. Along both routes the initial signal could not be seen from the next observation platform, due to rain; after restarting from the second station, both signals were successfully relayed to Ishigaki; in some instances it took up to ten minutes from the signal being observed for a fire to be lit sufficient for the smoke to be seen at the next station; the exercise highlighted the difficulty in transmitting signals by such a method in times of inclement weather and poor visibility.

List of beacons

References

{{Reflist Sakishima Islands History of Okinawa Prefecture 1640s establishments in Japan Historic Sites of Japan Coastal fortifications Beacons Ishigaki, Okinawa Miyakojima, Okinawa Taketomi, Okinawa Tarama, Okinawa Yonaguni, Okinawa

Locations

Operations

List of beacons

See also

References