Japanese MSX2 computer, 64kB RAM. This is a successor to the PHC-23. The difference seems to be with the location of Japanese characters on the keyboard, with the PHC-23J being JIS compliant.
Two revisions of the HPC-23J exist.
- 1st revision is the PHC-23J(GR) and has a Grey casing
- 2nd revision is the PHC-23J(B) and has a Blue casing
The first revision was first advertised in the 1987-10 issue of MSX Magazine
The second revision was first advertised in the 1987-12 issue of MSX Magazine.