This is a Japanese (NTSC-J) BIOS. Some games may require a BIOS from their specific region (USA or Europe) to boot correctly. Legal Method:
in March 2000 was more than a commercial event; it was a cultural shift. At the heart of the very first Japanese models, known by the model number SCPH-10000 download scph10000.zip
Run the PS2 initial setup inside the emulator to generate a new NVM. This is a Japanese (NTSC-J) BIOS