In December 1984 after receiving an invitation from Gary Player, Aoki traveled to South Africa to participate in the Million Dollar Challenge.
United States dollar | Australian dollar | Canadian dollar | The Six Million Dollar Man | Challenge Cup | Million Dollar Baby | Challenge Tour | New Zealand dollar | Hong Kong dollar | Challenge Anneka | University Challenge | Singapore dollar | Millennium Challenge Corporation | Dollar General | dollar | Diamond Challenge Sculls | USA Pro Cycling Challenge | Fijian dollar | Challenge | Billion Dollar Brain | United States Dollar | Two in a Million/You're My Number One | The Great Indian Laughter Challenge | Poker Million | Million Dead | Infinite Challenge | Family Dollar | Dollar | WRU Challenge Cup | World Club Challenge |
In an appearance on ITV's "This Morning", on September 27, 2011, magician Paul Zenon challenged Welsh psychic Leigh Catherine aka Leigh-Catherine Salway to take the one million dollar challenge and she accepted.