The Hong Kong Kowloon Treasure Murder Case File 1 - S1-E1
Continuity mistake: A mysterious man spills beverage on Miyuki's tanktop, creating a large brown stain that forces her to go change clothes. When she steps into the changing room from the urban legend, though, her clothes are pristine, the stain is entirely gone. (00:08:10 - 00:09:15)
The Hong Kong Kowloon Treasure Murder Case File 1 - S1-E1
Plot hole: The plot of the four-parter is complete nonsense even for a kid show. It is tied together by unbelievable pure coincidences; Miyuki is the perfect doppelganger of a missing model, Kindaichi randomly bumps into a high school mate who just happened to be in HK as well (!), and they both equally randomly (so they think) bump into the model who was just chilling on a park bench (so much for disappearing!), he befriends the son of the victim from 20 years before.
The Hong Kong Kowloon Treasure Murder Case File 1 - S1-E1
Other mistake: Throughout the episode, certain street signs ("Job&Piece", "Ocean Guest House") are used multiple times in different points of Hong Kong (for instance the establishing shot of the city, behind Kindaichi and his friends when they meet, during the bike chase).