If you lack the original card, you may need to purchase a pre-loaded "boot SD card." Sources like NavigationDisk provide English-language converted cards that can also help change the interface from Japanese.
# Download the .rpm package curl -O https://official-repo.nscd-w66.org/rhel/8/nscd-w66-2.4.1-1.el8.x86_64.rpm
: Since the factory software is in Japanese, many users seek "English SD card" downloads. These are often proprietary files provided by specialist vendors like NavigationDisk to unlock the system and change the language to English.