The release of Ace Attorney: Spirit of Justice in 2016 was the first time I played an episodic murder mystery adventure game on the current-generation Nintendo handheld involving a plot that progressed concurrently in both Japan and a small fictional country and revolved around a lost national treasure from said fictional country. And yet little to my knowledge, five years prior had seen the release of Detective Conan: Rondo of the Blue Jewel, an episodic murder mystery game involving... well, you can probably guess. Overall it's a decent game that perfectly captures the feel of Detective Conan. While there are a few areas that felt like they could have been polished up a bit (this is a licensed game after all), it delivers in the areas that are more important for the type of game it is.
I'm going to assume that you know the basic premise and characters of Detective Conan (also known as Case Closed in the West), so if you don't, now is probably a good time to skim the Wikipedia page.