Japanese Office Actions: How Response Period Extensions Differ Across Patents, Designs, and Trademarks
2026.08.01
Tatsuyuki TSUBO
When the Japan Patent Office (JPO) issues an Office Action (Notice of Reasons for Refusal), foreign applicants — that is, applicants who are not domiciled or resident in Japan — are generally given an initial response period of three months. The exact rules discussed below, however, differ significantly among patents, designs, and trademarks.
The initial period is where the similarity ends. The rules on extending that period differ substantially among the three laws, and they differ again between the examination stage and the appeal stage. Trademarks alone allow two types of extension to be combined; patents alone allow the appeal-stage period to be extended by three months; and the fee for an extension requested after the deadline ranges from JPY 4,200 to JPY 51,000 depending on the law.
This guide compares the three laws side by side, at the examination stage and at the appeal stage, from the perspective of foreign applicants.
1. Quick reference
The table below gives the headline figures for foreign applicants across the three laws.
| Patent | Design | Trademark | |
|---|---|---|---|
| Initial response period | 3 months | 3 months | 3 months |
| Max. response period (examination stage) |
6 months | 5 months | 6 months |
| Max. response period (appeal stage) |
6 months | Up to 4 months | 4 months |
| Extension after the deadline (examination stage) |
Available | Available | Available |
| Extension after the deadline (appeal stage) |
Not available | Not available | Not available |
| Appeal filing period | 4 months (3 + 1 automatic) |
3 months | 3 months |
Table 1: Extension rules for foreign applicants at a glance (patents, designs, trademarks)
2. Comparison at the examination stage
At the examination stage, all three laws allow an extension without any specific reason, both before and after the deadline. The differences lie in how much time each extension buys, whether the two can be combined, and how much they cost.
Two differences matter most in practice:
- Combining the two extensions: only trademarks allow it. For patents and designs, requesting an extension before the deadline closes off the late-filing route entirely.
- Cost of missing the deadline: the late-filing fee for a patent is JPY 51,000, roughly seven times the design fee and twelve times the trademark fee.
| Patent | Design | Trademark | |
|---|---|---|---|
| Initial response period | 3 months | 3 months | 3 months |
| Extension before the deadline | 3 months (2 requests: +2m, +1m) |
2 months (1 request only) |
1 month (1 request only) |
| Valid reason | Not required | Not required | Not required |
| Extension after the deadline | 2 months | 2 months | 2 months |
| Can the two be combined? | No | No | Yes |
| Total extension available | 3 months or 2 months |
2 months | 3 months (1m + 2m combined) |
| Maximum response period | 6 months | 5 months | 6 months |
| Fee (before the deadline) | JPY 2,100 per request |
JPY 2,100 | JPY 2,100 |
| Fee (after the deadline) | JPY 51,000 | JPY 7,200 | JPY 4,200 |
| When the extension after deadline is not available |
An extension was already given before the deadline or a written opinion or amendment was already filed |
An extension was already given before the deadline or a written opinion was already filed |
A written opinion was already filed (within the original or the extended period) |
Table 2: Extension at the examination stage — foreign applicants
3. Comparison at the appeal stage
Where an Office Action is issued after an appeal against a decision of refusal has been filed, the three laws diverge more sharply, and every route is stricter than at the examination stage.
Patents alone can reach a six-month response period at this stage, but only where a valid reason is accepted. Designs and trademarks are capped at one extra month. And in all three laws, no extension is available once the deadline has passed — there is no safety net at the appeal stage.
| Patent | Design | Trademark | |
|---|---|---|---|
| Initial response period | 3 months | 3 months | 3 months |
| Extension before the deadline | 3 months (1 month × up to 3 requests) |
Up to 1 month | 1 month (1 request only) |
| Valid reason | Required | Not required | Not required |
| Accepted reasons under current JPO practice |
(1) Comparative experiments (max. 1 request) (2) Translation of appeal documents (max. 3 requests) |
— | — |
| Extension after the deadline | Not available | Not available | Not available |
| Maximum response period | 6 months | 4 months | 4 months |
| Fee | JPY 2,100 per request | JPY 2,100 | JPY 2,100 |
Table 3: Extension at the appeal stage — foreign applicants
The patent “valid reason” requirement in practice
For patents, each request at the appeal stage buys one month and must state one of two accepted reasons. For foreign applicants, “translation of appeal procedural documents” is the practical one: it supports up to three requests, whereas comparative experiments support only one.
4. (Reference) Comparison of appeal filing periods
Separate from the response period, the deadline for filing the appeal itself also differs among the three laws. None of these periods can be extended on request, although limited statutory relief may be available where the deadline is missed for reasons beyond the applicant’s control.
| Patent | Design | Trademark | |
|---|---|---|---|
| Statutory period | 3 months | 3 months | 3 months |
| Extra month for foreign applicants | +1 month (ex officio, automatic) |
None | None |
| Total filing period | 4 months | 3 months | 3 months |
| Extension on request | Not available | Not available | Not available |
| Relief provision | Patent Act Art. 121(2) | Design Act Art. 46(2) | Trademark Act Art. 44(2) |
Table 4: Filing period for an appeal against a decision of refusal
Please note that this article is based on the information available and the applicable laws and regulations in effect as of the date of publication. While every effort has been made to ensure the accuracy of the information provided, no guarantee is made as to its completeness or accuracy. We assume no liability whatsoever for any loss or damage arising out of or in connection with the contents of this article. This article is provided for general informational purposes only and does not constitute legal advice. Before taking any action in a specific case, we strongly recommend consulting a qualified professional, such as a patent attorney.
