- Dueling Works: With the Fate Series, as they both involve a story about summoners who can call forth mystical beings and heroes from various mythologies and time in order to participate in a battle for supremacy to win some kind of ultimate prize.
- The Other Darrin:
- Junya Inaba replaces Marunaka Koji as Toji, Azazel, and Nyarlathotep.
- Toshimitsu Oda replaces Fuji Ryo as the 5th voice of the protagonist, Nomad, and Ghandarva.
- Masato Yoshida, who voiced Shiro, Shinya, Choji, Yule, and Horkeu Kamui, has retired from voice acting and is being steadily replaced. Hiroki Goto, who voices Seth, replaces his role as Shiro and Choji while Masahiro Ogata, who voices Bathym, Fenrir, Motosumi, and Eita, replaces his role as Horkeu Kamui. The other two characters, Yule and Shinya, currently use the same voice clips.
- Portmanteau Series Nickname: The game's nickname of "Housamo" is derived from its official full Japanese name: Tōkyō Hōkago Samonāzu.
- The Wiki Rule: The Housamo Wiki. Also includes unofficial translations of scenarios and general info.
- What Could Have Been: Christine originally had a much different design◊ compared to the final version, having a pink hat and dress, purple hair, a red eye, a white cape instead of a red sash, no parasol or floating masks, and having her eye mask on her left side instead of her right.
Trivia / Tokyo Afterschool Summoners