The object of his obsession sat on the workbench behind him: a Panasonic Strada CN-R300WD. It was a dinosaur, a double-DIN navigation unit from an era when GPS was a luxury and touchscreens required a firm, deliberate press. It had been pulled from a Japanese import—a beat-up 2006 Toyota Crown Athlete that had arrived at his shop with a dead battery and a cabin full of dust.
that provide custom firmware to change the Japanese menus to English via a new SD card image. Official Japanese Support: The most "official" place for updates is the Panasonic Japan Support site Panasonic Strada Cn-r300wd Software Download -