In Japan, the a patent application merely starts the process of obtaining a patent and one of the most important steps following the application is filing a request for examination of the patent. The Japan Patent Office will not examine a patent without being requested to do so and if the applicant does not submit a request within 3 years of filing his or her application the application will be considered withdrawn and no patent will be granted.
For international applicants the request must be submitted within three years of the international filing date, rather than the date of the Japanese patent application. It is important to have the advice of counsel when making patent applications to ensure that no important dates or procedures are missed unnecessarily.
If you have any questions about obtaining a patent in Japan please contact our office for a legal consultation.