When a foreign corporation cannot produce a home-country company register extract in the form Japan's Legal Affairs Bureau (法務局) requires, the standard fix is a notarized affidavit (宣誓供述書) with a Japanese translation, authenticated by a home-country notary, that country's consul stationed at home, or that country's consul stationed in Japan. The Tokyo consular route is often the cleanest: same-day, no apostille, but in-person signature only.
What Officer Structure Does a GK Have When the Representative Member Is a Foreign Corporation?
A Godo Kaisha (合同会社, GK) has only two statutory officer seats: the executive member / representative member (業務執行社員 / 代表社員) and the executor of duties (職務執行者). When the representative member is itself a foreign corporation rather than an individual, that corporation cannot personally sign filings or attend the Legal Affairs Bureau, so it appoints an individual executor of duties to act on its behalf.
This is the structural reason the affidavit problem exists at all. An individual representative member can usually rely on a passport and a residence record. A corporate representative member has to prove, to a Japanese registry that has never seen its home jurisdiction's corporate register, that the company exists, who controls it, and who it has appointed to act in Japan. That proof normally comes from a certified register extract from the home jurisdiction. Founders using this structure for a teikan-governed GK subsidiary should expect this step before they expect the incorporation itself to move.
Why Can't the Home-Country Register Extract Just Be Submitted Directly?
Because many jurisdictions do not issue a register extract in a format, content, or certification chain that the Legal Affairs Bureau will accept as proof of the four facts it needs: the company's existence, its registered office, its representative, and that representative's authority to appoint an executor of duties. Some registries omit incorporation dates or officer dates of birth entirely, and some do not certify the extract in a form recognizable to Japanese registration practice.
The standard workaround is not to keep pushing the register extract through in a different format. It is to replace it with a purpose-built affidavit (宣誓供述書) drafted specifically to contain what the Legal Affairs Bureau expects, notarized in the home country, with a Japanese translation attached. The affidavit does double duty: it evidences the foreign company's existence and authority, and it evidences the appointment of the executor of duties in the same document.
What Must the Affidavit Contain to Avoid Rejection?
The affidavit needs six specific data points, and missing any one of them is the most common cause of a rejection round-trip at the registry. This is a drafting-completeness problem more than a legal-substance problem, which is exactly why it trips up founders who assume any notarized document referencing the company will do.
Key points:
(a) The foreign company's registered office (本店), company name (商号), and incorporation date (設立日); missing the incorporation date is a frequent rejection trigger.
(b) The representative's name and date of birth, plus a clear statement appointing the executor of duties (職務執行者); missing a date of birth on either the representative or the executor is the other common rejection trigger.
(c) The executor of duties' own name, address, and date of birth, since the executor is the individual the Legal Affairs Bureau will actually hold responsible for GK operations in Japan.
Who Can Legally Notarize the Affidavit for a Japan-Bound Filing?
Three authenticators are accepted: a notary in the company's home country, that country's consul stationed in the home country, or that country's consul stationed in Japan. A consul of that same country stationed in a third country is not an accepted authenticator, even though the mission belongs to the right country, because the posting location is what matters, not the nationality of the mission.
This third-country trap is worth stating plainly because it is easy to assume any embassy of the home country will do. It will not. A foreign mission's notarial service is generally limited to documents intended for use in that mission's own home country. Concretely, the Singapore Embassy in Seoul processes notarial acts only for documents intended for use in Singapore, so it will refuse to notarize a Japan-bound GK affidavit even though it is unambiguously a Singapore government post. The founder has to route the same document to a different post entirely, either back to Singapore or to the Singapore mission actually stationed in Japan.
Why Is the Home-Country Embassy in Tokyo Often the Cleanest Route?
The home country's own embassy in Japan is an accepted authenticator, and using it avoids both an apostille and a trip abroad, though it still requires the signer to appear in Tokyo in person. Japanese registration practice recognizes the home country's consul stationed in Japan as a valid authenticator for the corporate affidavit, which puts the embassy inside walking distance of the filing rather than on the other side of the world.
The Singapore Embassy in Tokyo is a documented working example. It authenticates a Statutory Declaration (法定供述書) under Singapore's Oaths and Declarations Act 2000 for Legal Affairs Bureau filings, using the same substantive content an affidavit would carry: company existence, the representative's authority, the executor-of-duties appointment, both parties' dates of birth, and a signature match. Its published fee schedule, under the Diplomatic and Consular Officers (Oaths and Fees) Act effective 1 January 2026, prices the relevant line items directly: taking an affidavit is JPY 500 per person, a statutory declaration for one party is JPY 700, each referenced exhibit is JPY 200, an optional certificate of due execution including seal is JPY 1,900 per person, and registration and attestation is JPY 200.
The mechanics are consistent and worth planning around before booking a flight or an appointment. The document is drafted in English regardless of the signer's nationality, with no blank fields left in the declared content; if the declarant does not speak English, an interpreter must attend in person and co-sign. A Japanese translation is attached separately for the registry, and the declarant signs in person before the consular officer since pre-signed documents are not accepted.
The process is nationality-agnostic and, importantly, needs no apostille at all, because it is a domestic consular act filed directly with the Legal Affairs Bureau rather than a document that has to cross a border to prove its own authenticity. It runs same-day, by appointment. The tradeoff is presence, not paperwork: the deponent has to physically appear in Tokyo, which removes the need to travel to the home country but does not remove travel from the process entirely.
Is There a Fully Remote Alternative That Avoids Travel to Japan Entirely?
Some jurisdictions allow live-video notarization of the affidavit even though standard notarization normally requires physical presence, and Singapore is a documented example of this working end to end. The video-witnessed affidavit is then apostilled online through the Singapore Academy of Law (SAL) legalisation portal, since Singapore and Japan are both members of the Hague Apostille Convention.
Timing on this route is provider- and queue-dependent rather than fixed, so treat any number as an estimate to plan around rather than a guarantee. Providers and SAL generally state a notarial certificate arrives roughly one to two days after signing, with the apostille following same-to-next working day at the SAL counter, or two to three days if submitted online. That makes the fully remote route slower on paper than the Tokyo consular appointment, but it removes the requirement for anyone to be physically present in Japan or in Singapore.
Why Won't a US Online Notary Platform Work for This?
A US remote-online-notarization platform such as Notarize or Proof produces a US notary act, and a US notary act does not satisfy a requirement for notarization in the company's actual home country. This is the trap that catches founders who conflate "notarized remotely" with "notarized correctly." The controlling factor is the jurisdiction of the notary's commission, not whether the signing happened over video.
If the affidavit needs to be authenticated as a Singapore, Hong Kong, or other specific home-country instrument, a US notary's seal is simply the wrong jurisdiction's stamp, whatever the platform's convenience. It also is not on Japan's accepted-authenticator list under any of the three routes described above. Most US states have no apostille process for e-notarized documents in the first place, so the founder is often left with a document that cannot be authenticated forward at all, forcing a redo through the correct jurisdiction's notary or the correct country's consul in Japan.
What Should a Founder Confirm Before Choosing a Route?
Before committing to any of the three authenticator routes, confirm with the judicial scrivener (司法書士) handling the actual registration that the specific Legal Affairs Bureau office will accept the chosen instrument and authentication method. This is not a formality; requirements can and do vary by registry office and by the specific fact pattern of the GK's ownership structure, which is exactly the kind of jurisdiction and structure question covered in our broader guide to foreign company registration in Japan.
The scrivener should also confirm whether an apostille is genuinely required for the chosen route, or whether home-country notarization or the consul-in-Japan act alone is sufficient, since assuming either answer without registry-specific confirmation is how founders end up re-filing. This step sits alongside the broader documentation discipline covered in company formation generally, including the articles of incorporation that the GK's own governing documents are built on. Aplash's company setup service coordinates this confirmation with the retained scrivener as part of structuring the corporate representative-member appointment.
Frequently Asked Questions
Can I just use my home country's embassy in a third country if that is where I happen to be based?
No. A foreign mission's notarial service is generally limited to documents intended for use in its own home country, so a mission stationed in a third country will typically refuse to notarize a Japan-bound affidavit even though it belongs to the correct country. You need the home-country notary itself, that country's consul stationed at home, or that country's consul stationed in Japan; a consul stationed elsewhere is not an accepted substitute.
Does the affidavit route require an apostille?
It depends on which of the three authenticator routes is used, and this must be confirmed with the retained judicial scrivener against the specific Legal Affairs Bureau office handling the filing. The consul-in-Japan route is a domestic consular act filed directly with the registry and generally needs no apostille, while a home-country notarization, including a video-witnessed one, is typically followed by an apostille through that country's own legalisation authority.
Will a US online notary service work if my parent company is incorporated somewhere else, like Singapore?
No. The document needs notarization in the jurisdiction where the parent company is actually incorporated, and a US notary's commission does not substitute for that regardless of whether the signing was done remotely. Most US states also have no apostille mechanism for e-notarized documents, so this route commonly leaves founders with a document that cannot be authenticated forward at all.
Conclusion
The affidavit and executor-of-duties appointment is a narrow procedural step, but it is one of the few points in a GK formation where the wrong choice of authenticator forces a full restart rather than a correction. Confirming the authenticator, the required content fields, and the apostille question with the retained judicial scrivener before the signer travels or books a consular appointment is what keeps this step a single pass rather than two.
This article is informational only and does not constitute legal, tax, or regulatory advice. Consult a qualified advisor before acting on the content. Last updated: August 2026.