What are the requirements for Japanese utility model application documents?

Inventions under the via Paris Convention : 12 months from the earliest priority date.
via Nationalization of PCT inventions: 30 months from the earliest priority date.

Japan Patent Office

English: Japan Patent Office, abbreviation: JPO

Filing Language: Japanese

via Paris Convention

via Nationalization of PCT

Necessary documents:

Necessary documents:

Attachments (if any)

Scanned Copy of Certified Priority Document / DAS
Declaration of Ownership/Certification of Employment/Assignment of priority
Assignment for Patent Right Transfer
Notification issued by CNIPA notify the applicant the application has passed through the security review

Attachments (if any)

The design does not lose its novelty if it is disclosed by the designer in Japan within 12 months from the filing date/priority date.

20 years, and the validity period of patents for pharmaceutical inventions and pesticide inventions can be extended to 25 years upon application.

yes

yes.

Within the period of 9 years and 6 months from the date of application for the invention patent, or within 3 months from the date of receipt of the notification of rejection, the patent type of the invention patent may be changed from invention to utility model/design upon request
A request to change the patent type from invention to utility model/design can be filed within three months from the date of the JPO’s first decision to reject the application

A conversion fee shall be paid for patent type conversion. Once the original patent application is converted, it will be deemed withdrawn.

yes.

Within 3 years from the filing date, the patent type can be changed from utility model to invention upon request of the applicant
Utility model patents can be converted to design patents at any time

A conversion fee shall be paid for patent type conversion. Once the original patent application is converted, it will be deemed withdrawn.