In 1566, Ieyasu obtained the consent of the imperial court to use 'Tokugawa' as his hereditary surname (in actual fact a change of name) and was invested with the imperial court rank of Jugoinoge (Junior Fifth Rank, Lower Grade) of Mikawa Province.
永禄9年（1566年）、朝廷の許可を得て、家康個人が「徳川」に「復姓」（事実上の改姓）し、従五位下三河国に叙任された。