Uegusuku Castle (Kume)

Uegusuku Castle, also known locally as Wiigushiku, is a historic Ryukyuan gusuku fortification situated on the summit of Mount Uegusuku in Kumejima, Okinawa Prefecture, Japan. Perched approximately 310 meters above sea level, it holds the distinction of being the highest elevation castle among all gusuku structures in the Okinawa region. Constructed from locally mined slab-shaped andesite stones, the fortress was likely built between the late 14th and mid-15th centuries, prior to the political unification of the Ryukyu Kingdom. For several centuries, it served as the primary residence and administrative center for the Aji lords who governed the Kume Magiri district.

The site possesses significant archaeological value, offering insights into pre-unification trade and culture. Excavations have uncovered numerous artifacts, including over forty tenmoku tea bowls and other ceramic items imported from China. These findings suggest that robust trade relationships with China existed early in the island's history and that the consumption of powdered green tea was a practiced custom within the castle grounds. While gusuku sites functioned primarily as military fortifications, Uegusuku also featured gardens that acted as ceremonial gathering spaces for the local population and ruling class.

Today, Uegusuku Castle exists as a protected ruin and has been designated a National Historic Site of Japan since 2009. Although much of the original stone walling was destroyed during World War II, sections of the walls surrounding the north and east sides of the first bailey have survived the centuries. The site is currently open to the public, allowing visitors to explore the remnants of this elevated stronghold and view the surviving masonry that testifies to the region's feudal past and its connection to broader East Asian trade networks.