The neon LED sign is acting as an animated texture. The texture isn't actually animated, but rather it is cycling through several textures and putting the live one in front of the others at the right time. The frame is just a low-poly blackish material so to be game-ready.
The kanji is: 居酒屋 = Eating/drinking pub “izakaya” (Japanese language)
If you are using this for a game, probably just pick one of the textures if you don't want to animate it.
Music is synthwave generated in FL Studio 12.
The entire model and animation was generated via Python scripting in Blender 2.82.
Enjoy!