What is the process of handling Japanese patents?

For an invention patent, the patent application documents should be prepared first, and the application should be submitted to the Japan Patent Office, and a notice of acceptance should be issued. The Japanese Patent Office will publish the patent application documents for 18 months from the date of filing. Within three years from the date of filing, if the applicant needs to make a request for substantive examination, the patent application will be examined in substance, and the applicant shall reply to the notice of examination opinions. If the patent application meets the relevant legal requirements, the Japanese Patent Office will grant the invention patent right and make an announcement on the authorized patent.