On January 26, 758, Daijokan (Grand Council of State) specified that HOSHIKAWA no Maro had produced the achievements of Chuko (3rd level of 4 level of inheritance rights of Koden) and his Koden (rice fields given to vassals or their families for their achievements) should be inherited by two generations, to define his Koden 4-cho (39672 square meters).
天平宝字元年（757年）12月9日に、太政官は星川麻呂の功田4町の扱いを定めるために彼の功績を論じて中功とし、2世に伝えると定めた。