Sega released a port of Chunithm NEW!! exclusively on the Japanese Nintendo eShop. While you need a Japanese Nintendo Account, you can play it entirely legally. Crucial catch: You cannot use the "Air" motion controls without a Joy-Con, and even then, it uses gyro (motion control) rather than IR sensors. It is fun, but not arcade perfect.
Sega has released official home versions of Chunithm (e.g., Chunithm NEW!! via the cloud service in Japan, or the Nintendo Switch port of Chunithm). So why risk the complexity of Emuline? chunithm emuline
Use tools like Zenius -I- vanisher to locate a Round1 or Dave & Busters near you that imports Japanese rhythm games. The tactile experience of slapping real buttons and swiping the air is irreplaceable. Sega released a port of Chunithm NEW