''Chûzan seifu'' is an official history of Okinawa. There are two versions, one by [[Sai On]] and one by [[Sai Taku]]<!--蔡鐸-->, though most often it is the former that is being referred to. Sai On's version was formally completed in [[1701]], though he continued to add additional sections until [[1712]]. | ''Chûzan seifu'' is an official history of Okinawa. There are two versions, one by [[Sai On]] and one by [[Sai Taku]]<!--蔡鐸-->, though most often it is the former that is being referred to. Sai On's version was formally completed in [[1701]], though he continued to add additional sections until [[1712]]. |