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A Decision of Refusal (拒絶査定) from the Japan Patent Office is not the end of the case, but it starts...
Foreign IP counsel managing Japanese patent prosecution will encounter Office Actions (拒絶理由通知, kyozetsu riyu tsuchi) from the JPO. This guide explains the types of OAs, response strategies, deadlines, amendment rules, the powerful examiner interview option, and the appeal procedure for final rejections.
Key Takeaways
- Response deadline: 3 months for overseas applicants (60 days for Japan-resident applicants), counted from the dispatch date printed on the Notice — extendable by up to 3 more months before expiry, or by 2 months within 2 months after expiry
- Amendment scope rules differ for first OA vs final OA — strict at final stage
- Examiner interview (面接審査) is highly effective — increases allowance rate ~20%
- Final rejection appealable to JPO Appeal Board, then IP High Court
- Typical cost per OA response: $800–1,870
- Average 1.2–1.8 OAs per Japanese patent (varies by technology)
- PPH dramatically reduces OA count — average 0.5 OAs to grant
Table of Contents
1. JPO Office Action Types
Japanese OAs fall into categories based on the rejection ground:
| OA Type | Article (Patent Act) | Typical Cause |
|---|---|---|
| Novelty | Art. 29(1) | Prior art anticipates the claim |
| Inventive step | Art. 29(2) | Combination of references makes claim obvious |
| Lack of unity | Art. 37 | Multiple inventions in one application |
| Insufficient disclosure | Art. 36(4)(i) | Spec doesn't enable practice of claim |
| Indefiniteness | Art. 36(6)(ii) | Claim language unclear |
| Multi-multi claim | Art. 36(6)(iv) | Multi-multi claim structure (2022+) |
| New matter | Art. 17-2(3) | Amendment added subject not in original disclosure |
How to Read the Notice (拒絶理由通知書)
A JPO Notice of Reasons for Refusal is issued in Japanese. Four items on it decide your next step:
| Item on the Notice | What it tells you |
|---|---|
| 発送日 (dispatch date) | The response period runs from this date — not from the day your agent forwarded it. |
| 適用条文 (articles applied) | Art. 29(1) novelty / 29(2) inventive step / 29-2 prior-filed application / 36(4)(i) enablement / 36(6)(i)-(ii) support and clarity / 37 unity / 17-2(3) new matter. Each article maps to a different response strategy (Section 4). |
| 引用文献 (cited references) | Numbered list; the reasoning identifies which reference is applied to which claim. |
| 最後 (“final”) marking | If the Notice is marked as a final Notice, amendments are restricted to the narrow categories of Art. 17-2(5) (see Section 3). Check this before drafting. |
Entered Japan without a Japanese patent attorney?
A PCT applicant residing outside Japan may enter the national phase without a Japanese representative, but must appoint a patent administrator (特許管理人) within 3 months after the national processing standard time (Art. 184-11; Regulation Art. 38-6-2). If that was missed, the JPO issues a notice and gives 2 further months; failing that the application is deemed withdrawn — recoverable only under the “unintentional” standard (restoration fee JPY 212,100). See our national phase entry guide before responding to any Office Action.
2. Response Deadline & Extensions
The designated period for filing a written opinion (意見書) runs from the dispatch date printed on the Notice. Under the JPO Formality Examination Manual (04.10) it is 60 days for applicants resident in Japan and 3 months for overseas applicants (在外者) — the case for virtually every PCT national phase applicant reading this page.
Extensions follow the JPO practice in force since April 1, 2016 (patent applications):
| When you request | Overseas applicant | Japan-resident applicant | Official fee |
|---|---|---|---|
| Before the period expires | +2 months on the first request, +1 month on a second request (max. +3 months); no reasons required; both may be filed at once | +2 months (one request) | JPY 2,100 per request |
| After the period expired — within 2 months of expiry | +2 months from the original expiry (not from the request date); no reasons required. Not available if a before-expiry extension was granted, or if an opinion/amendment was already filed in time | JPY 51,000 | |
Why this matters for a case that was entered without local counsel
If nobody in Japan was watching the docket, the Notice may surface only after the 3-month period has run. The after-expiry route above means the response window can often still be reopened — provided the request is filed within 2 months of the original expiry. Send the Notice to Japanese counsel the day you find it.
Failure to respond does not withdraw the application — it leads to a Decision of Refusal (拒絶査定), which then starts the 3-month appeal clock described in Section 7. Restoration possible under "due care" within 1 year, but rarely granted.
Deadline tracking: JPO OAs are issued on a specific calendar date, with the 60-day clock starting that day. Foreign counsel should add 5–7 days buffer for international mail/processing.
3. Amendment Scope Rules
Amendments allowed in response to OAs are governed by complex rules:
First OA:
- Amendments must stay within "matters disclosed in original specification, claims, or drawings" (Article 17-2(3))
- Amendments must NOT add "new matter" not in original disclosure
- Within these limits, generally any amendment is acceptable
Final OA (after first OA response):
- Same new matter rule
- PLUS: amendments must be limited to limited reduction, deletion of claims, correction of clerical errors, or clarification of ambiguous descriptions
- Adding new features that weren't in claims before is restricted
Practical tip: Use the first OA response as the chance for broader claim restructuring. After final OA, your options narrow significantly. The four permitted categories, the independent-patentability test and dismissal of non-compliant amendments are covered in our guide to new matter and final Office Action amendment limits under Art. 17-2.
4. Response Strategy by OA Type
Novelty rejection: Argue distinguishing features, amend to specify differences from prior art
Inventive step rejection: Argue technical effects unattainable from cited combinations, specify motivation issues, add narrowing features — see how the examiner builds an Art. 29(2) rejection and how to take it apart
Lack of unity: File divisional application for separate inventions, OR argue unity exists
Insufficient disclosure: Cite specific spec passages, sometimes file declaration showing enablement
Indefiniteness: Clarify language, define terms in claim or spec — often translation-caused in national phase cases; see support, clarity and enablement rejections under Art. 36
Multi-multi claim: Restructure to single-dependent or independent claims (see which applications are affected)
New matter: Cancel the problematic amendment (see what still counts as within the original disclosure)
“Not an invention” (Art. 29(1) main paragraph): Recast software and business-method claims so that the information processing is concretely realized by hardware resources — see the hardware-resource test
5. Examiner Interview (面接審査)
Japan offers a powerful tool not always available in other jurisdictions: the examiner interview.
How it works:
- Request an interview with the examiner via the benrishi
- Discuss proposed amendments before formal filing
- Examiner provides preliminary feedback
- Often results in agreement on allowable claim scope
Why it's effective:
- Direct dialogue clarifies technical misunderstandings
- Examiner can point out claim language they would find acceptable
- Faster than back-and-forth OA exchanges
- Allowance rate after interview is statistically 20% higher
Cost: $400–800 attorney fee for interview preparation and execution. Often a great investment.
6. Cost per OA Response
| Complexity | Attorney Fee (USD) | JPO Fee | Total |
|---|---|---|---|
| Simple OA (1-2 issues, no amendment) | $640–950 | $0 | $640–950 |
| Moderate OA (with amendment) | $950–1,470 | $0 | $950–1,470 |
| Complex OA (multiple issues, declarations) | $1,470–1,870 | $0 | $1,470–1,870 |
| + Examiner interview | +$400–800 | $0 | +$400–800 |
| Extension request (if needed) | $80 | $14 | $94 |
7. Final Rejection & Appeal
If after OA responses the examiner maintains rejection, a Final Rejection (拒絶査定 kyozetsu satei) is issued.
Options for appeal:
Option 1: Request for Reconsideration before Trial (审判前審查官による再考慮) — Examiner reviews the case again with fresh eyes
Option 2: Appeal to JPO Appeal Board (拒絶查定不服審判) — File the appeal within 3 months of service of the decision (Art. 121(1)); for overseas applicants the JPO extends this period ex officio by 60 days under Art. 4 (Formality Examination Manual 04.10). Three-judge panel reviews. ~50% reversal rate.
Option 3: Continue prosecution via divisional — File a divisional application with modified claims within 3 months of service (Art. 44(1)(iii); extended in step with the appeal period for overseas applicants, Art. 44(6)). Deadlines, amendment limits and how to combine the three routes: Received a Decision of Refusal? Appeal, Pre-Appeal Reexamination or Divisional.
8. JPO Appeal Board (審判)
The JPO Appeal Board is a separate body from the examination division.
Process:
- File appeal within 3 months of service of the Decision of Refusal (Art. 121(1)) — overseas applicants receive an ex officio 60-day extension (Art. 4)
- Pay appeal fee (JPY 49,500 base + per-claim fee)
- Submit written arguments (typically 30-60 pages)
- Optional oral hearing (highly recommended)
- Decision typically 6–18 months
Outcomes:
- Affirmance (Final Rejection upheld)
- Reversal (allowance granted, case sent back to examiner)
- Reversal with claims required to be amended
9. IP High Court Appeal
If the JPO Appeal Board affirms the rejection, you can appeal to the IP High Court (知的財産高等裁判所).
Process:
- File within 30 days of Appeal Board decision
- Limited to specific grounds (procedural error, factual error, etc.)
- Decision typically 12–24 months
- Higher court appeal (Supreme Court) possible but very limited
10. Strategic Recommendations
From decade of prosecution experience:
1. Examiner interview is your best tool — use it generously, especially for second OAs
2. PPH is the best prevention — fewer OAs to begin with
3. Don't accept narrow first-OA allowance — argue at first OA when amendment scope is broader
4. Document everything — JPO file wrapper estoppel applies in litigation
5. Consider divisional — preserves option to pursue different scope while accepting allowance
Frequently Asked Questions
Q. Can I file amendments after the final OA?
A. Yes, but with restrictions. Amendments at final OA must fall into one of four categories: limited reduction, claim deletion, error correction, or clarification. New claim scope additions are restricted.
Q. What is the success rate for JPO Appeal Board?
A. ~50% reversal rate (appeals granted). Oral hearings increase success modestly. Filing strong arguments is essential.
Q. How long does an OA response typically take to prepare?
A. Standard: 7–14 business days. Complex cases: 2–3 weeks. Examiner interview adds 1–2 weeks for scheduling.
Q. Can I extend the 60-day OA deadline?
A. For overseas applicants the period is 3 months, not 60 days. Before it expires you may extend it by 2 months (first request) plus 1 month (second request) at JPY 2,100 each, no reasons required. If it has already expired, a single 2-month extension can still be requested within 2 months of the expiry date (JPY 51,000), unless a before-expiry extension was granted or a response was already filed. Source: JPO notice on extension practice from April 1, 2016.
Q. What happens if I miss the OA deadline?
A. The application is not withdrawn; the examiner issues a Decision of Refusal. You then have 3 months from service (plus an ex officio 60-day extension for overseas applicants) to file an appeal, and amendments may be filed together with the appeal. Before that stage, check whether the after-expiry 2-month extension (available within 2 months of expiry, JPY 51,000) is still open.
Q. Should I do an examiner interview at the first OA?
A. For complex rejections or when claim scope is unclear, yes. For simple rejections (clear amendments needed), interview adds cost without much benefit.
Deep Dives by Rejection Ground
Ground-by-ground guides for national phase cases
Inventive Step Rejections (Art. 29(2)): How the Examiner Builds the Argument — and How to Take It Apart
→ Read full guide
New Matter and “Final” Office Actions: Amendment Limits Under Art. 17-2
→ Read full guide
Support, Clarity and Enablement Rejections (Art. 36)
→ Read full guide
“Not an Invention” Rejections (Art. 29(1)): Software and the Hardware-Resource Test
→ Read full guide
Received a Decision of Refusal? Appeal, Pre-Appeal Reexamination or Divisional
→ Read full guide
Missed the 30-Month Deadline for Japan? Restoration Under the “Unintentional” Standard
→ Read full guide
Related Resources
Continue exploring Japan IP topics for foreign counsel
PPH in Japan: How Foreign Applicants Save 50%+ on Patent Examination
→ Read full guide
Japan Patent Translation: AI + Benrishi Hybrid Review Process
→ Read full guide
PCT National Phase Entry Japan: Complete Cost & Timeline Guide 2026
→ Read full guide
Japan Patent Search & FTO for Foreign Counsel
→ Read full guide
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Sources (verified September 2026)
- Japan Patent Act (Japanese text), Arts. 17-2, 48-3, 50, 121, 184-4, 184-11 — laws.e-gov.go.jp
- Regulations under the Patent Act, Art. 38-6-2 (patent administrator periods) — laws.e-gov.go.jp
- JPO: extension of response periods for Notices of Reasons for Refusal (practice from April 1, 2016) — jpo.go.jp
- JPO: relief after expiry of periods under the “unintentional” standard (updated May 18, 2026) — jpo.go.jp
- JPO Formality Examination Manual 04.10, statutory and designated periods (overseas applicants) — jpo.go.jp (PDF)
