It is illegal to mod game save data and game consoles in Japan. Both are punishable by up to five years in prison and fines up to 5 million yen ($46,000).
According to the official site for Japan’s Association of Copyright for Computer Software, modding game save data and game consoles violates the country’s Unfair Competition Prevention Law. The Japanese government is expanding regulations to protect game console content.
Cyber Gadget has since stopped selling the Save Editor on its Japanese site.
The Association of Copyright for Computer Software also mentions that unofficial software codes and keys are also illegal. Specifically, mentioned is offering these on online auctions and making them available for download. Finally, modding game consoles, as well as games, are included the third provision mentioned by the association.
These additional stipulations were included under amendments to the Unfair Competition Prevention Law.