Many of these Japanese titles are sought after because they: Files for CHD-PSX-JAP - Internet Archive
When downloading ROM sets, you will often see them in the original format, which is still the most compatible raw image type. If you find a Japan-exclusive game in BIN/CUE format, you will need to convert it to CHD yourself. Psx Chd Japan -
Stands for Compressed Hunks of Data . It is a lossless compression format originally designed for MAME that reduces file sizes by up to 50% without losing any game data. Many of these Japanese titles are sought after