Not exactly a music game from Konami, but I do play using a simulator based on IIDX series with Lunatic Rave 2. Shame there aren't many games similar to IIDX and its lack of popularity here in the states, but it is really fun to play and not to mention it becomes quite a workout at high levels :P
Buying resources out of their own pockets, spending energy and effort, with almost no return so that everyone can enjoy the cultural and entertainment products of developed countries at almost zero cost walking in the dark to serve the light, they are real heroes