From the late 1990s to 2000s, after Sailor Moon, she designed the characters for Wedding Peach, Petite Princess Yucie, Jūsō Kikō Dancouga Nova, Valkyria of the Battlefield 3: The Wound Taken from Someone's Sake, and Nobunagun.
In June 2018, it was announced that Tadano was chosen as a character designer for Pretty Guardian Sailor Moon Eternal The Movie, a two-part anime film project that takes place as a "fourth season" for the Pretty Guardian Sailor Moon Crystal anime series, adapting the Dream arc of the manga.
[2][3][4] In December 2019, both Tadano and her husband, Hiromi Matsushita, were chosen as character designers for the sixth spin-off of the Yu-Gi-Oh!
[5] In December 2021, Tadano and Matsushita were chosen as character designers again for the seventh spin-off, Yu-Gi-Oh!
[6] In April 2022, it was announced that Tadano will design the characters for Sailor Moon Eternal's sequel, titled Pretty Guardian Sailor Moon Cosmos The Movie, another two-part anime film project that takes place as a "fifth and final season" for the Pretty Guardian Sailor Moon Crystal anime series, adapting the Stars arc of the manga, and was released in June 2023.