In 754, Makibi was promoted to Dazai no shoni (Junior Assistant Governor-General) of Dazai-fu (a military base) in Chikuzen Province where he ordered to build Ito-jo Castle to reinforce the national defense against Shila (ancient Korean kingdom) in 756.
754年（天平勝宝6年）には大宰少弐に昇任、756年に新羅に対する防衛のため筑前国に怡土城を築いた。