Kumon Math and Reading Center of Diamond Bar 1155 S. Diamond Bar Blvd.Suite R & S1Diamond Bar, CA, 91765Gateway Friends Church View Phone 909-260-1183 Toll Free: 800-222-6284 1155 S. Diamond Bar Blvd., Suite R & S1Diamond Bar, CA 91765Gateway Friends Church View Website Experience & Reliability About Connect with this Business: Send to My Email Send to My Phone Print this Page