The anime series Dear Brother saw release in limited form in North America previously on DVD through Anime Sols but it’s long been out of print at this point.
The anime adaptation didn’t come until 1991 where it ran for thirty-nine episodes at Tezuka Productions with the incomparable Osamu Dezaki directing it for the company.
Dear Brother (1991) Opening - Kin no Utsuwa, Gin no Utsuwa