TOKYO — What may have seemed like a simple file-sharing activity is turning into a costly legal problem for some BitTorrent users in Japan, as copyright holders increasingly use the courts to identify people suspected of illegally sharing copyrighted material.
A recent case highlighted by The Straits Times involved a Tokyo man in his 40s who received a court notice approving the disclosure of his personal information after his internet activity was allegedly linked to copyrighted files shared through BitTorrent.
About 20 days later, he received a demand from a lawyer representing a video production company seeking ¥500,000 (about S$4,065), with the possibility of further civil or criminal action if the matter was not addressed.
The case is part of a much broader trend.
According to figures from the Tokyo District Court, applications seeking disclosure of identifying information in intellectual-property cases rose from 814 in 2023 to 2,454 in 2024 and 5,320 in 2025. A Japanese Communications Ministry survey found that 95.6% of disclosure requests received by major internet service providers in 2024 involved alleged copyright infringement connected to adult videos.
The reason BitTorrent cases can become complicated is its peer-to-peer structure. While a user may believe they are merely downloading a file, the technology can simultaneously upload portions of that file to other users.
Copyright holders have developed systems capable of identifying IP addresses associated with suspected file-sharing activity. They can then seek court orders requiring internet providers to disclose information that may identify the subscriber.
Lawyers cited in the report say ignoring a settlement demand can carry risks. At the same time, they note that recipients do not necessarily have to immediately accept the amount initially demanded, with negotiations potentially taking place depending on the circumstances.
One lawyer representing people facing such claims said production companies have developed systems that allow these cases to be pursued on a large scale.
The Tokyo man’s own experience illustrates the personal pressure that can accompany such disputes. After seeking legal advice, negotiations began over the amount being demanded.
Another potential complication is that resolving one claim may not necessarily address other alleged infringements involving different copyrighted works or rights holders, according to lawyers interviewed by The Straits Times.
Japan’s growing number of disclosure applications underscores a broader shift in how copyright owners are pursuing suspected online infringement.
For internet users, the message is increasingly clear: peer-to-peer file sharing can carry legal consequences far beyond the initial download.
And as rights holders become more systematic in identifying suspected users, the question now is how far this enforcement campaign could expand.
WWC ONE MEDIA G,A
