It is also considered that Yoshisue possessed Tokugawa District, Nitta County (present-day Tokugawa-cho, Ota City, Gunma Prefecture) and called himself Shiro TOKUGAWA ("Gunma Prefecture Encyclopedia").
また、新田郡得川郷（現在の群馬県太田市徳川町）を領有して、得川四郎を称したとされる（『群馬県百科事典』）。