The Death March of Young Kindaichi File 1 - S2-E1
Continuity mistake: Inside the hotel room, the three guys from 18 years prior receive a macabre gift. The one in the grey suit opens the box, and the knuckles of the severed hand are pointed towards him. In the last shot of the table though, the hand is turned the other way around. (00:08:15)
The Death March of Young Kindaichi File 1 - S2-E1
Character mistake: For being a genius raised abroad, Takato's English pronunciation is abysmal - check out when he says the line about the magic crystal on stage. (00:12:40)
The Death March of Young Kindaichi File 1 - S2-E1
Continuity mistake: When Kindaichi is slapped offstage, his body turns one way in one shot, but he lands in the opposite way in the next. (00:13:25)
The Death March of Young Kindaichi File 1 - S2-E1
Other mistake: During this episode and the next 4 of this story arc, the signs of the stores in Hong Kong are recycled from the first episode of the series. Hong Kong is a pretty big city, the odds of Kindaichi (who is not staying at the same hotel nor dealing with anything related to the first case) just happening to be in the same nondescript streets with the "Ocean Guest House" are astronomically low.