For Japanese games, ensure your emulator’s "Region" detection is set to NTSC-J. Many games (like Puyo Puyo Sun ) will display incorrectly or crash on a USA BIOS.
Ripping and converting a full set of 4,000 discs would take weeks and requires a robotic disc changer. Most users download pre-converted CHD sets instead. psx chd japan full
PlayStation preservation, CHD compression, ROM archiving, Japanese game history, redump For Japanese games
: It reduces the size of standard .bin/.cue rips by roughly 40-60% without losing data (lossless). Japanese game history