Sparkopolis (Japanese: アオバハラ,Aobahara) is a district in Yo-kai Watch 3. Located in the Springdale Region, it is one train stop to the west from Downtown Springdale on the Central Line. Sparkopolis is heavily based off the real-life Akihabara district of Tokyo.
Sparkopolis appears in EP077 where Hailey Anne lines up to buy a limited-edition Sailor Cuties figurine.
It is not well-known whether Sparkopolis is part of Springdale itself, but seeing as the area gets its own drawn map, It's implied it is either a standalone city, or a distant part of Springdale.
The name of Maid in Heaven is based off the phrase Made in heaven. Additionally, The restaurant seems to be a place where new couples are formed, hinting to the name being based on said phrase.
This restaurant is also based of the famous (or infamous) real-life maid restaurants that one can find at and around Akihabara, known for their young maids who will treat their customers like royalties, and do live performances.
Stores like AnimeChum and various other stores that are found here also reference to the fact that Akihabara is a world-famous attraction for gamers and otaku form all over the world.
There is a secret club to access behind the Bike Racks near the Station. The quiz answers are "right", "Sailor Cuties", and "Maid."