The Oyama case provided an important precedent for other racial and civil rights cases. In Shelley v. Kraemer, the opinion of Oyama would provide strong support for the fight against restrictive covenants. When preparing the brief for Shelley v. Kraemer, A.L. Wirin attended the conference and it was agreed that the connection between the Alien Land Law and restrictive covenants be acknowledged. The United States Supreme Court determined restrictive covenants a violation of the Equal Protection Clause of the Fourteenth Amendment and cited Oyama as a deciding factor for its decision.