TonyHax International exploit on PSOne SCPH-100 NTSC-J console
This PS1 FreePSXBoot-based exploit finally allows you to boot backup or import copies of PSX game into Japanese PSX consoles. All you will need is an actual copy of PSX NTSC-J game and when the exploit is booted, you will be prompted to insert the original copy of PSX game and also blocking the lid sensor (I'm using some sort of twisted tie to block the lid sensors) and allow the game disc to run first before swapping it to import or backup copy of the game.
After the game finally boots, you must remove the exploited memory card from the console to prevent the game from accessing it and attempting to format the card. On the side note, it is best to use original PSX memory cards, not the cheap clone before installing FreePSXBoot-based TonyHax International exploits.
Some additional infos:
1. Backups can be launched as well but it may requires backup discs to be burned at such high speed i.e 48x or 52x if you don't meddle at laser pot.
2. If the exploit fail to boot, remove any other memory cards and leave the exploited memory card inserted. You have to put the exploited memory card on correct slot.
Details can be referred to this site here: https://alex-free.github.io/tonyhax-international/