Stories of the Japanese People 01425 [Three Mountains] Eiso Dynasty

The Eiso Dynasty has begun. Eiso was a wise ruler who built the prosperity of the country, and the circumstances of his birth were legendary.
Eiso's mother became pregnant after dreaming of the Supreme Deity (the highest god in the heavenly realm). Because of this, people called Eiso "Tedako," meaning "Child of the Sun." Even today, in Urasoe City, Okinawa Prefecture, where Eiso was born, the "Tedako Festival" is held, the civic hall is called "Tedako Hall," and there is a mascot character named "Teda-ko."
Eiso immediately toured the provinces, established boundaries for fields, and organized the legal system. As a result, in 1264, Kume Island (Kumejima Town, Okinawa Prefecture), the Kerama Islands (Tokashiki Village and Zamami Village, Okinawa Prefecture), and Iheya Island (Iheya Village, Okinawa Prefecture) requested to pay tribute to Eiso. Furthermore, in 1266, even Amami Oshima (Amami City, Kagoshima Prefecture) began paying tribute. Having increased agricultural productivity and expanded his territory, Eiso is the first king with a certain degree of historical possibility, and he can truly be called the ancestor of the Ryukyu Kingdom.
Eiso passed away in 1299 at the age of 70.
Subsequently, Eiso's eldest son, Taisei (1247–1309), ascended to the throne as the second king. No particular achievements remain, and it is only stated that he "was modest and treated people with benevolence and righteousness." He reigned for nine years and passed away in 1309 at the age of 62.
Next, Taisei's second son, Eiji (1268–1313), ascended to the throne as the third king. Again, no achievements are recorded, and it is stated that he "governed by observing old customs and was quiet and wise." He reigned for four years and passed away in 1313 at the age of 45.
Next, Eiji's fourth son, Tamagusuku (1296–1336), ascended to the throne as the fourth king. Tamagusuku was a lecherous man who also loved hunting, and because he neglected politics, the Aji (local lords) stopped following him, and eventually, the Ryukyu Kingdom split into three. In other words,
・In the south, Satto (?-1394?), who was the Aji of Ozato (Nanjo City, Okinawa Prefecture), became independent and called himself "King of Nanzan"
・In the north, Haniji (?-1395), who was the Aji of Nakijin (Nakijin Village, Okinawa Prefecture), became independent and called himself "King of Hokuzan"
Thus, Tamagusuku was reduced to being the "King of Chuzan," ruling only the Chuzan region centered on Urasoe Castle. Tamagusuku sent out troops to try to suppress Nanzan and Hokuzan, but no conclusion was reached.
In 1336, Tamagusuku passed away, and his son Seii (1328–1349) ascended to the throne as the fifth king at the age of eight, but the young king became a puppet of his mother. The decline of Chuzan was severe, and when Seii passed away in 1349 at the age of 21, the people did not place his orphaned child (aged five) on the throne, but instead installed Satto (1321–1395), the Aji of Urasoe. Thus, the Eiso Dynasty perished after five generations.