Shō Nei

Shō Nei was the king of the Ryukyu Kingdom from 1589 to 1620. He ruled during a period of major political shifts in East Asia. His reign is most notable for the 1609 invasion by the Shimazu clan. This clan was a powerful feudal domain in Japan known as Satsuma. Because of this invasion, Shō Nei became the first Ryukyuan king to serve as a vassal. A vassal is a ruler who owes loyalty and service to a more powerful lord. This relationship changed the way the Ryukyu Kingdom functioned for many generations.

Early in his reign, Shō Nei faced pressure from the Japanese warlord Toyotomi Hideyoshi. Hideyoshi was planning an invasion of Korea and demanded military help. He also ordered Ryukyu to stop its official missions to China. Shō Nei refused to send warriors to help with the Korean invasion. However, the kingdom did send a mission to Beijing for the king's formal investiture. This mission informed Chinese officials about Hideyoshi's plans. Shō Nei later sent a letter to Hideyoshi to congratulate him on his power. In this letter, the king described Ryukyu as a small and humble island kingdom.

Relations with the Shimazu clan grew difficult after Hideyoshi died in 1598. The new Japanese government, called the shogunate, asked Ryukyu to submit to its authority. Shō Nei ignored this request. In response, the Satsuma forces invaded the Ryukyu islands in the spring of 1609. They first landed in Northern Okinawa and attacked Nakijin Castle. During this battle, Shō Nei's son and heir, Shō Kokushi, was killed. The invasion continued until the forces surrounded Shuri Castle. Shō Nei surrendered on the fifth day of the fourth lunar month.

After the surrender, Shō Nei was taken on a long journey through Japan. He first traveled to Sunpu to meet the retired Shōgun, Tokugawa Ieyasu. Next, he went to Edo to have a formal audience with the current Shōgun, Tokugawa Hidetada. Finally, he was taken to Kagoshima to meet the Shimazu clan. At Edo, the Shōgun decided Shō Nei could stay in power due to his family history. This event was unique because it was the first time a foreign king visited Japan. The Shimazu clan used this meeting to increase their own political status and privileges.

In Kagoshima, Shō Nei was forced to swear several formal promises called oaths. One major set of rules was known as the Fifteen Injunctions. These rules stated that Ryukyu could not trade or have diplomacy with other nations without Satsuma's permission. These maritime and diplomatic restrictions lasted for over 250 years. Shō Nei and his Council of Three also had to swear that Ryukyu had always been a dependency of Satsuma. This was a falsehood, but it was required as part of the surrender. The oaths also claimed the invasion was a punishment for Ryukyu's past failures.

By 1616, the strict control Satsuma held over Ryukyu began to change. At the request of Satsuma, many "Japanization" measures were reversed. This allowed Shō Nei to be granted primacy over his own kingdom once again. For the rest of his life, he held the traditional symbols of royal authority. He exercised great power within the limits set by the Shimazu clan. Shō Nei's reign helped establish a long-lasting political framework between Ryukyu and Japan.

When Shō Nei died, he was not buried in the royal mausoleum at Shuri. Instead, he was buried at Urasoe Castle. Some people believe he felt he had dishonored his ancestors by surrendering to Satsuma. However, historical records show that Shō Nei was originally from Urasoe. His life and his decisions left a permanent mark on the history of the islands. The vassal relationship he entered into shaped the politics of the region for centuries.