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Gusuku period
Geographical rangeRyukyu Islands
PeriodPost-classical
Datesc. 1050 CE–c. 1429 CE
CharacteristicsGusuku
Preceded byShellmidden period
Followed byRyukyu Kingdom
The ruins of Katsuren gusuku, Uruma, Okinawa

The Gusuku period (グスク時代, Gusuku jidai) is an era of the history of the Ryukyu Islands corresponding to the spread of sedentary agriculture from Japan and increased social organization, eventually leading to the construction of the namesake gusuku fortresses. Directly following the Shellmidden period, the Gusuku is generally described as beginning in the 11th century, following a dramatic social and economic shift over the previous centuries. The Shellmidden-Gusuku transition has been linked alternatively to migrants from Kyushu, possibly Hayato refugees, or to Yamato influence from the Dazaifu trade outpost on Kikaijima. Such developments may have also led to the emergence of the Proto-Ryukyuan language.

The period saw extensive agriculture in the archipelago, including the cultivation of foxtail millet, rice, barley, and wheat. Trade occurred with China and Japan, both with the imports of foreign ceramics and the export of the local Kamuiyaki ware. A unique vernacular architecture emerged in the region, featuring elevated village houses. Initially defended by palisades, the rise of the local aji nobility steadily led to the expansion of fortifications, eventually leading to the construction of the namesake gusuku, massive limestone fortresses which proliferated across Okinawa and Amami. Increasing consolidations of aji holdings led to the tripartite division of Okinawa into the Sanzan lordships. The Gusuku period is usually considered to have ended during the first Shō dynasty's hegemony over the island in the early 15th century and the creation of the Ryukyu Kingdom.

To do

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  • Redo and expand emergence of the Ryukyu Kingdom section
  • (once else is done) go back and expand lede

Background

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A map of the Ryukyu Islands
Island groups of the Ryukyu Islands

The Ryukyu Islands are an island chain on the eastern rim of the East China Sea, adjacent to Taiwan in the southwest and Kyushu to the northeast.[1] Intermittent human settlement of what would become the Ryukyus began in the Late Pleistocene, c. 32,000 years ago.[2] Hunter-gatherer groups originating from neighboring Kyushu began to populate the central and northern Ryukyus c. 5000 BCE, although recent sites suggest possible initial dates of c. 7000 or c. 12,000 BCE. This repopulation of the Ryukyus began the Shellmound or Shellmidden period.[3][4]

Complex hunter-gatherer societies emerged during the mid-Shellmidden, but polities such as chiefdoms did not emerge. This is attributed to low populations and carrying capacity prior to the introduction of intensive agriculture.[5] The Shellmidden people exploited plentiful shellfish and reef fish populations.[6] They also hunted the Ryukyu wild boar, the largest mammals on the islands, and possibly tended to domestic pigs.[7]Although other East Asian populations adopted agriculture long before the beginning of the Common Era, cereal cultivation did not occur in the Ryuykus prior to c. 800 CE, with plant foods largely limited to nuts. Cultivation of taro or other root crops has been theorized, although without conclusive archaeological evidence.[8][9] The lone unambiguous cultigens from the Shellmidden are bottle gourd seeds recovered from the Okinawan Ireibaru site.[10]

While various other theories positing significant pre-Gusuku cereal agriculture have been proposed, such developments would require the unlikely abandonment of agriculture in lieu of foraging.[11] The first signs of agriculture in the region date to the Late Shellmidden, evidenced by flotation samples dating to the 800s. However, cultivation remained relatively limited until a rapid expansion in the tenth to twelfth centuries, corresponding to a steady increase of migrants from Japan.[12]

Chronology

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Older sources use a later definition of the Gusuku period, beginning c. 1200 CE and stretching well into the early Ryukyu Kingdom. However, following increasing archaeological evidence for subsistence agriculture and greater social complexity in the centuries prior, contemporary sources have largely restricted the period as lasting from c. 1050 to c. 1429, corresponding to the period of increased trade, societal shifts, and endemic warfare prior to the centralization of the Kingdom of Chūzan and the unification of the Ryukyu Kingdom.[13][14]

Within the Yaeyama Islands (or Sakishima more generally), the period corresponding to the Gusuku is sometimes described as part of the Suku period, divided between the Shinzato Mura (12th–13th centuries) and the Nakamori Period (13th–17th centuries).[15][16] Due to their close proximity and trade links to Kyushu, the Ōsumi Islands largely follow corresponding archaeological periods in Japan, adopting rice and millet cultivation during the Middle Yayoi period.[17]

Emergence

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Beginning around 300 BCE, the Shellmidden population saw steady decline from its peak. Populations remained low across the 1st millennium CE. The islanders traded with Japan, but saw little from it cultural influence from it beyond pottery designs.[18] During the 9th century, the Dazaifu (the regional Japanese government of Kyushu) established the Gusuku site on Kikaijima as a trading outpost. Exploiting the lucrative trade of turbo sea snail shells (a source of mother of pearl highly prized by artisans) the Kikaijima became a major trading hub closely tied to the Japanese port of Hakata and the Goryeo Kingdom; a small community of merchants from Goryeo settled on Kikaijima, leading to the creation of the Kamuiyaki stoneware with cultural influence from Korean ceramics. The Gusuku site became a polity encompassing Kikaijima and the Kasari peninsula of neighboring Amami, which was itself becoming an early center of agriculture in the region.[19]

Beginning in the the 11th century, large numbers of agrarian Japonic speaking peoples settled the Ryukyus, with Kikaijima as the origin of various successive migration waves across the archipelago. These migrations, while all originating on Kikaijima, spread progressively southward; the Amami Islands were the first to be fully settled, followed by the Okinawa Islands, the Miyako Islands, and finally the Yaeyama Islands.[20][21] This migration was likely motivated by access to various trade goods found in the southern islands, highly coveted in Song China and by the Heian aristocracy.[22]

Language and demography

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The indigenous population of the Ryukyu Islands prior to the Gusuku migrations was of Jōmon ancestry, with little of the Yayoi genetics pervalent in mainland Japan. Interactions between this population and the Japonic newcomers varied across the archipelago. However, many Japonic communities formed cultural enclaves, evidenced by both material cultures coexisting for several centuries. In other cases, Japonic settlements emerged with practically no indigenous influence whatsoever. Indigenous culture on the islands gradually assimilated or disappeared, vanishing entirely by the 14th century.[23]

Due to their shared set of innovations absent in Japanese, the modern Ryukyuan languages are generally thought to form one of the two or three main branches of Japonic,[α] and descend from a common Proto-Ryukyuan origin.[24] They retain archaic features from Proto-Japonic that were lost in Old Japanese, leading to a divergence date no later than the 7th century. However, it maintained close contact with Japanese until the 8th or 9th century, due to Sino-Japanese vocabulary borrowed from Early Middle Japanese. This divergence prior to the Gusuku period suggests a Pre-Proto-Ryukyuan[β] homeland in southern Kyushu and the surrounding islands. Proto-Ryukyuan itself branched off from this earlier form in the archipelago, possibly on Kikaijima, where it diversified as it spread across the archipelago.[26][27][28]

Earlier, now-discredited theories attribute the emergence of Proto-Ryukyuan to either the Hayato people, speakers of a divergent Japonic language, settling the Ryukyus after the conquest of southern Kyushu by the expanding Yamato state, or as evolution from a trade creole on Kikaijima.[27][28][29]

Developments

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Agriculture

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A close-up of a field of foxtail millet plants
Foxtail millet was a staple crop of the Gusuku period.

Large scale cultivation as the primary means of subsistence in the Central Ryukyus began as the Shellmidden transitioned into the Gusuku. Agriculture likely took root in the Amami Islands in the 8th century, before spreading to the Okinawa Islands 100–200 years later. Rice and millet agriculture spread to Sakishima by the 12th century.[30]

Cereal crops such as rice, barley, wheat, and foxtail millet have been found in Gusuku sites, alongside possibly beans. Southern Okinawa sites mainly grew millet and barley, while rice predominated in northern Okinawa and Amami Ōshima. This rice was initially japonica rice, but tropical O. sativa was likely introduced later via trade with China and Southeast Asia. Farms were initially in low-lying alluvial regions, but gradually shifted to higher slopes.[12] Wheat and barley were largely grown through dryfield cultivation, with irrigation largely limited to rice paddies.[31] Cattle were used to cultivate both varieties of field.[32] Archaeologial examinations of sites at Miyako-jima have revealed similar crops to Okinawa and Amami. Foxtail millet composes the vast majority of finds, alongside smaller numbers of Adzuki beans and broomcorn millet.[33]

The centrality of agriculture to Gusuku period sociey is a topic of academic contention. Historians have generally analyzed the Gusuku as a stratified agrarian society, attributing the growth of a nobility and state polities to this agricultural base. Others have disputed this, suggesting that local agriculture was unlikely to produce significant surplus, and instead attributing these developments to maritime trade.[34]

Architecture

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A small wooden storehouse atop large wooden pole supports
Reconstruction of an elevated storehouse, Ocean Expo Park, Okinawa

Shellmidden-era construction was largely limited to pit-houses. The agrarian settlements of the Gusuku saw a flourishing of vernacular architecture. Settlements during the 11th to 13th centuries typically comprised several elevated main houses raised on posts with diameters of 50 centimetres (1.6 ft) or more. Pillars within the house were typically spaced by a bay (ken) of roughly 1 metre (3.3 ft), significantly smaller than the ken spacings used in traditional Japanese architecture. Houses contained hearths, with the largest having two. Elevated storehouses (termed takakura) were positioned 10–15 metres (30–50 ft) from the main structures, generally to the southwest so as to maximize sunlight. Some of these village sites include the remains of metalworking facilities, including pits for the storage of ironsand and hearths equipped with clay tuyeres.[35]

Gusuku

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The ramparts of an ancient stone castle.
Nakagusuku, Kitankagusuku, Okinawa

In the 13th century, villages were increasingly built in defensive positions during and surrounded with palisades. By the later portion of the century, some settlements were partially encircled by stone walls. These early fortifications enclosed residential areas of both commoners and elites, as well as some utaki shrines, with satellite villages outside the walls. During the 14th and 15th centuries, these fortifications evolved into the gusuku, with the largest taking the form of massive stone fortresses enclosing elite residences, shrines, and work areas oriented around a central plaza.[36] By the 15th century, there was approximately 100 gusuku on Okinawa.[37]

Stone-walled gusuku, found on Okinawa, Yoron, and Okinoerabu, were likely inspired by Korean mountain fortresses.[38] Many were were built with coral limestone, although earthen construction is attested in southern Okinawa.[36] In the north of the island, where coral limestone was not available, ditches dug across ridges were used as fortifications.[39] Many of the larger gususku were built by slaves taken during wokou raids, and used Japanese and Korean-style roofing tiles likely built by foreign tilesmiths who settled in the islands.[40]

While many gusuku were permanent installations, some were only occupied only during emergencies.[41] Gusuku dramatically vary in size. Smaller structures measuring less than 2,000 m2 (0.5 acres) feature a single enclosure, while much larger gusuku ranging from 1–2 ha (2–5 acres) have multiple. Even larger castles exceeding 2 ha (5 acres) emerged after the end of the Gusuku period.[39]

Gusuku on Amami were built for mountain defense, and feature smaller enclosures and large ditches. They were built on "virtually every ridge and headland", protecting rivers and bays, often built in direct line-of-sight of one another.[42] Smaller enclosed fortifications were constructed in Sakishima,[36] although some examples of stone-walled gusuku are attested.[41]

Society and governance

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A class of local nobility, the aji, began to emerge during the early Gusuku period. Local aji initially constructed small gusuku as a show of political power. As particular aji consolidated holdings and absorbed the territories of neighboring lords, the fortifications steadily grew in size and complexity.[43] The most powerful nobles were referred to as aji-osoi ("leader of lords"). They commanded local armies, and held control over less powerful aji within their territories.[44] Larger polities shared power between the ruler and various councilors.[13]

A severe lack of written documentation prior to the 17th century limits the understanding of state and religion during the period. Later myth incorporates various legendary Japanese and Chinese figures into Ryukyuan history. The earliest named ruler, the 11th century Shunten, may have been based after the legendary Emperor Shun.[45]

Trade and foreign relations

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A Chinese porcelain ewer, in a blueish-white color
Song dynasty Qingbai ware was imported during the Gusuku period.

Although trade links (mainly of shells) between Kyushu and the central Ryukyus date to the Yayoi, the transition into Gusuku period saw the import of Chinese ceramics and Japanese soapstone cauldrons, used alongside native earthenware. The Gusuku people also imported iron knives and magatama from Japan.[46][47][48] By the late 12th century, they began importing ceramics (such as Qingbai ware and celadon) directly from China, including types not found in the main Japanese islands. By the 13th century, imports shifted to Longquan celadon, with smaller amounts of Korean, Thai, and Vietnamese ceramics.[48] In addition to the Japanese and Goryeo traders at Kikaijima, traders from the Song Empire became active in the Ryukyu Islands during the Gusuku period.[49][50] Sulfur mined at Iōjima was likely exported to China.[51]

During the late 14th century, tribute missions were sent by Okinawan aji to Ming China and Joseon Korea, with formal tribute relations with the Ming commencing in 1372; the establishment of formal tribute status during this period resulted in a much greater volume of trade. Diplomatic relationships with the Ashikaga shogunate may have been opened by the lord of Shuri in 1403.[13][52][53]

Wokou

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The Ryukyus were major bases of Wokou pirate activity from the late 13th century onward to the end of the Gusuku period. Many wokou were aligned with the Southern Court during the Nanboku-chō period, with major bases on Kyushu and Tsushima. Following the collapse of the Southern Court in the 1380s and 1390s, Kyushu wokou migrated to the Ryukyus, outside of the reach of the victorious Ashikaga shogunate. Naha served as the primary port of call in the Ryukyus, and became a major center of piracy and slave trading during the late Gusuku period.[54][55]

Emergence of the Ryukyu Kingdom

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Both contemporary Ming dynasty tribute records and later Ryukyuan official histories state that Okinawa was divided into three kingdoms, collectively termed the Sanzan, during the 14th and early 15th centuries; Sanhoku in the north, Chūzan in the center, and Sannan in the south. These polities may have functioned as loose confederations of aji, with their kings as confederation leaders. Alternatively, they may not have corresponded to territorial control on the island, and were instead labels that various powerful aji operated under during trade and tribute relations with the Ming.[56][57]

By 1429, Okinawa's tribute relations with the Ming became the domain of a single ruler, Shō Hashi. Hashi, the son of Shō Shishō of Chūzan and possibly the grandson of a Southern Court wokou from Higo Province, came to power with the defeat of Bunei of Chūzan, likely due to the aid of Chinese officials.[58] He was a powerful military leader, although likely lacked political control over all of Okinawa. The various other kings of Chūzan followed him as the sole tribute king of Okinawa, forming the First Shō dynasty at the Shuri gusuku.[59] The kingdom went through a rapid series of rulers of only a few years each after his death, often marked by succession crises and wars. The kings of the First Shō dynasty may not have been linked as a bloodline or family.[60] The southern Ryukyu Islands were likely under a series of local warlords, with trade relations to Shuri and the Shō dynasty.[61]

A portrait of an enthroned King Shō Shin accompanied by various attendants
18th century portrait of Shō Shin and attendants

In 1453, Shō Taikyū emerged as the ruler of Shuri. Before his death in 1460, he conquered Katsuren gusuku, minted coins in his name, and took full control of trade with Korea. He launched military expeditions to Amami and Kikaijima, but failed to achieve full political hegemony over Okinawa. His son Shō Toku took the throne after his death, beginning an eight-year rule described by the Ryukyuan official histories as despotic.[62]

A 1470 coup d'état by Sho En founded the Second Shō dynasty. The reign of his son Shō Shin (1477 – 1526) saw the centralization of the Ryukyu Kingdom at Shuri gusuku and the final subjugation of outlying islands such as the Yaeyama. Local aji were forced to live at Shuri, with agents titled aji-uttchi assigned to administrate their holdings in their place, destroying the last elements of Gusuku period local governance.[14][44][63]

Historiography

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Extant sources

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Extremely few written documents date to the Gusuku period, with primary sources mainly limited to foreign diplomatic and tribute records during the latest portion of the period, such as the Ming Veritable Records and the Veritable Records of the Joseon Dynasty. A domestic compilation of diplomatic and trade records, the Rekidai Hōan (歴代宝案, lit. Precious Documents of Successive Generations), began in 1424, around the end of the period; it was initially compiled by Chinese merchants and trade officials in Okinawa. An inscription on the Bankoku Shinryō no Kane (万国津梁の鐘, lit. Sea Bridge to the Many Countries Bell) dates to 1458.[64][65]

The first official or state history of Ryukyu, the Chūzan Seikan (中山世鑑, lit. Reflections on Chūzan) was published by Shō Shōken in 1650, long after the end of the Gusuku period, and was mainly based off interviews with elderly officials. Later state histories include the two early 18th century versions of the Genealogy of Chūzan (中山世譜, Chūzan seifu) and the mid-18th century Kyūyō (球陽, lit. Beautiful Ryukyu). Largely based on Confucian historiography and principles, it is not possible to corroborate most information from the official sources dating to periods prior to the 16th and 17th centuries.[64] The Omoro sōshi (おもろさうし, Okinawan: Umuru U-Sōshi) is a compilation of Ryukyuan chants or songs, comprising 22 volumes and 1,553 songs, with the earliest volumes compiled during the early 1530s. Difficult to decipher and understand, the Omoro at times disagrees with the official histories.[66] However, both are biased towards Shō Shin, the Shuri area, and Okinawa in general.[67]

Traditional historiography

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The official histories state that a sage king of divine ancestry, Tenson, was the first king of a unified Okinawa. Following this, Shunten, the son of Minamoto no Tametomo, reunified Okinawa around 1187 and began his own dynasty. Shunten was almost certainly fictional, but may reflect the relocation of trading infrastructure to Okinawa after the 1188 invasion of Kikaijima.[68][69] Eiso is described as displacing Shunten's dynasty and ruling from 1260 to 1299. He is the earliest named ruler to appear in the Omoro. Although traditionally depicted as the king of a unified Okinawa, he was likely a regional warlord in Urasoe.[70]

Modern historiography

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Zenchū Nakahara, writing in the 1950s, was among the first historians to identify a major discontinuity in Ryukyuan history during what would come to be known as the Gusuku period. Highly skeptical of the official histories, he described the rise of aji, warrior culture, migrations from Japan, and endemic warfare in the twelth century. Nakahara wrote that Shō Hashi and the First Shō Dynasty ruled Okinawa in name only, and that true unification and the emergence of a mature feudal society emerged under the Second Shō. Other contemporary historians, such as Inamura Kenpu and Higa Shunchō, also identified the Gusuku period, viewing it as a social and political transformation of an existing Japonic culture in Ryukyu analagous to Japan's earlier development.[71]

The centrality of Japan to development in the Ryukyus was challenged in the 1980s and 1990s as Okinawa's domestic development was emphasized, with historians such as Takara Kurayoshi and Murai Shōsuke emphasizing the independent emergence of a complex political order on Okinawa from agricultural surplus during the Gusuku period, often placing more credence into the official histories. This has been challenged by other historians who emphasize the importance of trade, with the Gusuku period representing a sudden and dramatic break from earlier periods, as large-scale migrations of Japonic peoples early in the period led to significantly greater connections with maritime trade routes.[72]

Notes

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  1. ^ If including the Hachijō language of the Izu Islands as its own branch of the Japonic family[24]
  2. ^ "Pre-Proto-Ryukyuan" is also called Proto-Kyushu-Ryukan in some sources.[25]

References

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Citations

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  1. ^ Pearson 1998, pp. 119–120.
  2. ^ Pearson 2013, p. 10.
  3. ^ Pearson 2013, pp. 47–48.
  4. ^ Takamiya & Shinzato 2024, p. 174.
  5. ^ Takamiya & Shinzato 2024, pp. 188–191.
  6. ^ Pearson 2013, pp. 108–117.
  7. ^ Pearson 2013, pp. 82, 103–106.
  8. ^ Pearson 2013, pp. 102–103, 106–108.
  9. ^ Takamiya & Shinzato 2024, p. 187.
  10. ^ Takamiya & Nakamura 2020, p. 22.
  11. ^ Takamiya 2001, p. 64.
  12. ^ a b Pearson 2013, pp. 150–152.
  13. ^ a b c Pearson 1998, p. 124.
  14. ^ a b Pearson 2013, pp. 146–148.
  15. ^ Takamiya & Nakamura 2020, p. 26.
  16. ^ Pearson 2013, pp. 167–168.
  17. ^ Takamiya & Nakamura 2020, pp. 18–20.
  18. ^ Smits 2024, pp. 18, 85–88.
  19. ^ Smits 2024, pp. 89–94.
  20. ^ Smits 2024, pp. 94–98.
  21. ^ Pellard 2015, pp. 30–32.
  22. ^ Smits 2024, pp. 98–100.
  23. ^ Smits 2024, pp. 18, 85–88, 96–98.
  24. ^ a b Pellard 2015, p. 15.
  25. ^ Jarosz et al. 2022, p. 97.
  26. ^ Pellard 2015, pp. 21–23, 29–32.
  27. ^ a b Smits 2024, p. 97.
  28. ^ a b Jarosz et al. 2022, pp. 14–15.
  29. ^ Pellard 2015, pp. 29–32.
  30. ^ Takamiya & Nakamura 2020, pp. 24–26.
  31. ^ Pearson 2001, p. 246.
  32. ^ Pearson 1998, p. 122.
  33. ^ Takamiya & Nakamura 2020, pp. 26–27.
  34. ^ Smits 2024, pp. 137–145.
  35. ^ Pearson 2013, p. 154.
  36. ^ a b c Pearson 2013, pp. 154–156.
  37. ^ Smits 2019, p. 36.
  38. ^ Smits 2024, pp. 132–133.
  39. ^ a b Pearson 1998, p. 120.
  40. ^ Smits 2024, pp. 159–167.
  41. ^ a b Smits 2024, pp. 157–161.
  42. ^ Pearson 2013, pp. 155–157.
  43. ^ Akamine 2017, p. 11.
  44. ^ a b Akamine 2017, p. 12.
  45. ^ Pearson 1998, p. 126.
  46. ^ Pearson 1990, p. 921.
  47. ^ Jarosz et al. 2022, p. 6.
  48. ^ a b Pearson 2007, p. 127.
  49. ^ Pearson 2013, p. 150.
  50. ^ Jarosz et al. 2022, pp. 7–13.
  51. ^ Pearson 2013, pp. 156–157.
  52. ^ Smits 2019, p. 23.
  53. ^ Smits 2024, pp. 163–164.
  54. ^ Smits 2019, pp. 48–49.
  55. ^ Smits 2024, pp. 161, 165–167.
  56. ^ Smits 2019, pp. 77–79.
  57. ^ Smits 2024, pp. 196–198.
  58. ^ Smits 2019, pp. 107–113.
  59. ^ Smits 2024, pp. 224–231.
  60. ^ Smits 2019, pp. 113–114.
  61. ^ Smits 2024, pp. 241–243.
  62. ^ Smits 2024, pp. 232–236.
  63. ^ Smits 2024, pp. 247–255.
  64. ^ a b Smits 2019, pp. 1–4.
  65. ^ Smits 2024, pp. 21–22.
  66. ^ Smits 2019, pp. 1–5.
  67. ^ Smits 2024, pp. 22–23.
  68. ^ Smits 2024, pp. 23, 35, 283.
  69. ^ Smits 2019, p. 87.
  70. ^ Smits 2024, pp. 19, 30, 180.
  71. ^ Smits 2024, pp. 27–37.
  72. ^ Smits 2024, pp. 37–47.

Bibliography

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