What are the requirements for Japanese utility model application documents?

yes

25 years

yes. Multiple designs may be included in one design application.

1-2 years

yes

• Grant fee: The applicant should pay the granted fee and the annual fee for the first year within 30 days after receiving the granted notice.
• Annuity: The annual fee shall be paid year by year from the second year from the date of granted, and the payment of the annual fee may be postponed within 6 months if the annual fee is overdue, but a 200% penalty shall be paid at the same time.

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.

• via Paris Convention : 6 months from earliest priority date.
• Hague Agreement route: 6 months from earliest priority date.

Japan Patent Office

English: Japan Patent Office, abbreviation: JPO

Website: Japan Patent Office (jpo.go.jp)

Japanese Utility Model Patent Search: Japan Platform for Patent Information｜J-PlatPat [JPP] (inpit.go.jp)

yes