His case was first verified by Guinness World Records, who titled him the oldest man ever, but Guinness have in recent years backed away from their previous statement; in the Guinness World Records Book 2012, Christian Mortensen is titled "the oldest verified man ever", and Izumi is not mentioned.
Izumi Shikibu | Izumi-Tamagawa Station | Izumi Matsumoto | Kyōka Izumi | Izumi |