People pointing out that this is some weird quirk of Japanese law: if there's an argument that reverse engineering the software to determine how this works is circumvention of a technical control, this would potentially be a violation of 17 U.S. Code § 1201 - https://dair-community.social/@kendraserra/11167540121678898... discusses case law around a separate kind of case, but one that could be argued here. Let's not criticise Japanese law without acknowledging that US law is also fucked up.