WikiMoon:Anniversaries/May 31
- Yoshiko Sakakibara, the voice of Queen Nehellenia in the Sailor Moon anime, was born on this day in 1956.
- Hiroyuki Matsumoto, who played Nephrite in PGSM, was born on this day in 1980.
- Seira Saeki, the second actress to play PallaPalla in the Sailor Moon musicals, was born on this day in 1990.