Dating Japanese-made Fender guitars (including those manufactured during joint ventures with Tokai and Dyna Gakki) involves checking the prefix letter and serial number sequence typically stamped near the headstock or neck heel. For instance, "JD" or "ASE" serial numbers indicate specific production decades, while "Crafted in Japan" or "Made in Japan" lettering combined with specific alphabetical prefixes (such as JV, SQ, or E) maps directly to precise manufacturing windows managed by Japanese partner factories between the early 1980s and modern eras.