Under the Japanese Patent Act, registration is required for an exclusive licensee to be able to assert its exclusivity directly against any third party , as opposed to requesting the licensor to do so. Specifically, a licensee who enters into an exclusive licence agreement with a patentee without registering such exclusive licence with the Japan Patent Office has no right to directly demand an infringer of the licensed patent to cease its infringement even within the field in which the licensee shall have the exclusivity under the licence agreement. Rather, a licensee needs to register certain information in the patent registry maintained in the Patent Office in order to obtain such right and become a true exclusive licensee. Under the current registration system, the exclusive licensee’s name and the scope of the licence shall be registered and such information shall be made available to the public; however, this registration system has been unpopular because licensees are generally reluctant to disclose information which may be considered business secrets.