Quick answer — Izumi Toudou worked on Heartcatch Precure! (Original Creator), Go! Princess Precure (Original Creator), HUGtto! Precure (Original Creator) and 18 more anime.
Izumi Toudou worked on Heartcatch Precure! (Original Creator), Go! Princess Precure (Original Creator), HUGtto! Precure (Original Creator), Kyousougiga (Original Creator), Ojamajo Doremi Sharp (Original Creator), Star☆Twinkle Precure (Original Creator), Ashita no Nadja (Original Creator), Fresh Precure! (Original Creator) and 13 more.