The "J" signifies the Japanese region. This version is the very first commercial release of the game and is distinct from the North American (USA) and European (PAL) versions due to hundreds of minor changes made during the localization process.
The painting for Jolly Roger Bay depicts bubbles in the water rather than a sunken ship. Additionally, the frame for this painting is not gold, unlike most others. super mario 64 j z64
Many iconic voice lines from Charles Martinet are absent. Mario does not say "Hello!" on the title screen, "Okey-dokey!" when selecting a file, or "Let's-a-go!" when starting a level. Princess Peach also lacks voice acting in the opening and ending cutscenes. The "J" signifies the Japanese region