Mamazon (ママゾン) is an online shopping retailer used by Miia in obtaining some of her outfits. Unfortunately some of the items of clothing she buys needs to be adjusted by Kimihito Kurusu to fit her properly. As a result, Kimihito has become quite adept at altering clothing.
- It is unknown whether Mamazon is a liminal species-specific retailer or a human-centric retailer.
- Mamazon is a parody of the real-world online shopping retailer Amazon.com.