The Yamaha CX5F music computer is the CX5M aimed at the Japanese market. The key differences are the presence of an internal power supply and the Japanese keyboard layout, which arguably has a better "return" shape as one key has been shifted up in the Western version.
MSX BASIC v1.0
3.58 MHz Zilog Z80 CPU
32 kb (up to 64 kb) RAM, 16 kb VRAM, 32 kb ROM
General Instruments AY-3-8910
SFG-01: FM tone generator (4 operators, 8 algorithms)