Originally wanted to kill all of the main characters at the end of the first Sailor Moon manga arc but her editor wouldn't let her do that since it was a girls series.
Was in the manga & astronomy clubs in high school, which provided her w/ background knowledge to build up the extensive mythologies for her works.
Much of her work's based on aspects from her life.
Based her "Sailor Moon" protagonist Tsukino Usagi on her teenage self in her teenage years: scatterbrained and dreamy, but bighearted & romantic. She also wears an odango style, something Takeuchi did in college for good luck. Similarly, she based the Tsukino family on her own: she had a devoted but busy father named Kenji, a loving but nagging mother named Ikuko & a bratty younger brother named Shingo.
Served as a shrine maiden at the Shiba Daijingu Shrine during college. She made her Sailor Moon character Rei Hino a shrine maiden based on this experience.
I really wanted to write a story with a sexy girl, a good-looking guy, some romance, video games, and cute school uniforms! Of course Bunny [Usagi/Serena Tsukino] is strong, too... we've got to be strong for our boys! Right, girls?