In 665, Ryutokuko, who was a Junior Fifth Ranking (Lower Grade) official of Gishu and the head of state of Shiba, came to Wakoku as an envoy to process post-war matters and left after three months.
665年に唐の朝散大夫沂州司馬上柱国の劉徳高が戦後処理の使節として来日し、3ヶ月後に劉徳高は帰国した。