Thanks to the Uchinanchu Taikai, I had a bus pass for unlimited free bus rides all over the island, for nearly a full week after the Taikai ended. So I decided to try to make the most use out of it (well, for one day anyway) while I still could, and went up to Katsuren gusuku – about a one hour bus ride from here, a ride which would normally have cost around 1000 yen (US$10) each way. Saved quite a bit of money.
But before actually going to the castle, I first went to the Yonashiro History Museum. Why it’s Yonashiro and not Yonagusuku is a mystery to me, but in any case, this was a tiny local history museum based in one wing of the town hall. A few years ago, archaeologists working on the grounds of Katsuren castle found a number of coins, which in recent months they determined to be, most probably, from the circa 4th century Roman Empire. That would make these the only Roman coins ever found in Japan – speaking to the incredible maritime activity and connections of pre-modern Okinawa, long before the island ever became part of any Japanese state.
(rough translation my own; apologies for any errors)
Coins from the Roman and Ottoman Empires discovered at Katsuren Castle
About the excavated coins: In the 2013 archaeological survey conducted at Katsuren castle, ten small, round, metal coins were discovered (nine within the grounds of the castle, and one outside). The metal objects discovered in the survey were brought back [to the research center], and when they were further examined, four were determined by experts’ analysis to be circa 4th century Roman coins, and one a coin made in the 17th century Ottoman Empire. However, as analysis continues, the possibility remains for a different result [to emerge].
The dates we are currently conjecturing for the production of these coins places all five outside of the 12th to 15th centuries, the period of Katsuren’s peak prominence. Continued examination of the Katsuren site, and of ceramics and other objects excavated there, [will hopefully provide some answers as to] why these coins were found there, and how they came to Katsuren.
Other examples of similar coins being discovered in Okinawa are unknown, and it is thought likely that this is the first discovery of similar coins [i.e. from the Roman Empire] anywhere in Japan.
It is thought there is a possibility that someone related to Katsuren castle and serving as some kind of point of contact between East and West obtained the coins somewhere, and as such this is a very important find for continuing research on [the extent and form of] Katsuren’s still largely unconfirmed networks of interaction & exchange. This can be seen as a significant development not only for the fields of Okinawan history or Japanese history, but also for those of the histories of Western Asia, or of the West, and as such for World History as a whole.
Plans from here on: The remaining five coins which have not yet been thoroughly identified will be cleaned, and the designs and inscriptions on them will be examined. Further, the sites that have been excavated, and the artifacts excavated from those sites, will be carefully examined, a more thorough analysis of the composition of the objects will be undertaken, and from this we plan to better determine the time and place when/where they were made.
The History and Archaeological Surveys of Katsuren Castle
Katsuren castle was built around the 12th or 13th centuries, and flourished in the 14th and [early] 15th centuries through overseas trade. The castle fell in 1458, as the tenth lord of the castle, Amawari, was attacked by the armies of the Shuri royal government [i.e. of the unified Kingdom of Ryukyu which ruled over the whole island] and was defeated. From then through roughly the 17th century, the castle was used by the local people in some fashion, but little is known about this period in any detail.
Excavations on the grounds were begun in 1965 by the Ryukyu Government Cultural Properties Protection Agency [part of the Okinawan civil self-government under US martial Occupation], and in 1972 [following the return of Okinawa to Japanese sovereignty] the site was named a National Historic Site. The site was named in 2000 as one of the sites included within the umbrella UNESCO World Heritage Site designation “Gusuku Sites and Related Properties of the Kingdom of Ryukyu.” Today, the Katsuren Castle Site Maintenance Project receives funding from the Agency for Cultural Affairs [an agency within the Japanese national government], and the cultural office of the Uruma City Board of Education is overseeing archaeological excavations and restoration efforts. Excavation efforts began in earnest in 2012, with a focus on the fourth enclosure (the outermost of the castle’s four main enclosures, baileys, or enceintes, depending on one’s preferred term), and excavations of the eastern and northern portions of this area, and of the area immediately around the Nishihara Gate, were completed in 2015.
From my own notes, taken at the exhibition (if only they would have allowed us to take photos!! then I’d have the full gallery labels to look at again, and to take the time to translate them – I just didn’t have the time or patience to copy down everything by hand, on the spot):
Coin #2: seems to be from the Roman Empire, c. late 3rd century.
Coin #5: seems to be a mid-4th century Roman bronze coin. Possibly inscribed “CONSTANTIVS”.
Coin #7: seems to be a coin issued on the occasion of the death of Constantine I in 337, thus making the coin’s date circa 337 to 340 CE.
Coin #8: seems to be from the period of shared/collaborative rule between Constantius Gallus and others, c. 337 to 340s or 350s CE. Researchers have noted similarities to a coin dated 347-348 CE and inscribed “CYZICVS.”
Other objects excavated from the castle site and displayed at the museum included Chinese coins from the Sui (581-618), Northern Song (907-1127), and early Ming (1368-1644) dynasties, as well as dice, hairpins, smoking pipes, elements of Japanese weapons & armor, and plenty of shards of pottery, including Chinese celadons and other luxury items from overseas.
I’m sorry that I don’t have more information… I shall certainly keep my eyes open for further news articles or the like.
Stay tuned for Part Two of this post, as I finish talking about my adventures of that day, at Katsuren castle, the surrounding neighborhood, and in Futenma/Ginowan on the way home.