What is Koseki Tohon and why is it needed?

Koseki Tohon is the Japanese family register. The embassy uses it to confirm the Japanese spouse's marital status before issuing the CNI.

When must the marriage be reported to Japan?

Within 3 months of the Thai amphur registration. Filing the Konin Todoke late incurs a ¥10,000-50,000 fine under Family Registration Act.

Does Japan accept Thai Apostille?

Yes. Japan is a Hague Apostille member and accepts Thai Apostille (issued since Dec 2024) without further legalization, except for a few prefectures that still request MFA legalization.

Does my Thai document need to be translated to Japanese?

Most Japanese authorities accept certified English translations. For 区役所 (ward office) marriage filings, a Japanese translation is preferred — we provide both.

Can you handle a kekkon todoke (婚姻届) from Thailand?

Yes. We prepare the Thai marriage certificate, translate to Japanese, Apostille, and courier directly to the Japanese ward office where your spouse is registered.

THAI NOTARY LAW

Phitsanulok • Thailand

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🇯🇵 Japan ↔ Thailand

Thai-Japan Marriage Registration — Complete 2026 Guide

Everything a Thai citizen needs to legally marry a Japan (🇯🇵) partner in Thailand — embassy paperwork, certified translation, MFA legalization, amphur registration, and post-marriage filings back in Japan.

Apostille (Hague 1961)Embassy: BangkokTranslate to Japanese (or English with Japanese cover)

AI Quick Answer

How does a Thai citizen marry a Japan national in Thailand?

The Japan spouse obtains a Certificate of No Impediment (or equivalent affidavit) from the Japan Embassy in Bangkok, has it translated into Thai and legalized by the Thai Ministry of Foreign Affairs, then registers the marriage at any Thai amphur with two witnesses. After registration, request the English Kor Ror 3 and re-legalize it via MFA for use in Japan. Total time: 7-14 days.

Total timeline: 7-14 days
Total budget: ฿12k-20k
Legalization path: Apostille
Translation language: Japanese (or English with Japanese cover)

Japan-Thailand specific procedure

1
ฝ่ายญี่ปุ่นขอ Koseki Tohon (戸籍謄本) ล่าสุดจากสำนักทะเบียนเทศบาลในญี่ปุ่น (มีอายุ 3 เดือน)
2
นำไปยื่นที่สถานทูตญี่ปุ่นถนนวิทยุ — ออก Konin Yoken Gubi Shomeisho (婚姻要件具備証明書 — CNI ญี่ปุ่น) ค่าธรรมเนียม 660 บาท
3
แปลไทย + MFA legalize 3 วันทำการ
4
จดทะเบียนที่อำเภอ
5
นำ คร.3 ไปจดที่สถานทูตญี่ปุ่นภายใน 3 เดือน — จะถูกบันทึกใน Koseki ของสามี/ภรรยา

Documents the Japan spouse must bring

Passport ญี่ปุ่น
Koseki Tohon ออกไม่เกิน 3 เดือน
Inkan (ตราประทับ) — แนะนำให้พกมา ใช้เซ็นเอกสารหลายขั้น

Cultural & legal notes

ญี่ปุ่นบังคับ Koseki — ทะเบียนครอบครัวที่ระบุทุกคนในตระกูล
หลังจดที่ไทยต้องแจ้งสถานทูตภายใน 3 เดือน (Konin Todoke 婚姻届) — เลยกำหนดจะถูกปรับ
Spouse Visa ญี่ปุ่นใช้เวลา 1-3 เดือน

Processing timeline

Standard case: 7-14 working days — ถ้ามี Koseki พร้อมแล้ว จบใน 1 สัปดาห์

Estimated total cost

THB 12,000 – 20,000 (covers translation, MFA legalization, embassy fees, amphur registration, and interpreter when required)

Japan-side legalization chain

01Notarization by Thai NSA
02Japanese translation (or certified English)
03Thai MFA Apostille
04Japanese Embassy Bangkok consular legalization (if requested)

Key facts — Thai-Japan marriage

7-14

Days end-to-end

฿12,000+

Starting cost (THB)

Embassy steps

Bangkok

Embassy location

Yes

Hague Apostille member

Foreign-side documents

Frequently asked questions

What is Koseki Tohon and why is it needed?: Koseki Tohon is the Japanese family register. The embassy uses it to confirm the Japanese spouse's marital status before issuing the CNI.
When must the marriage be reported to Japan?: Within 3 months of the Thai amphur registration. Filing the Konin Todoke late incurs a ¥10,000-50,000 fine under Family Registration Act.
Does Japan accept Thai Apostille?: Yes. Japan is a Hague Apostille member and accepts Thai Apostille (issued since Dec 2024) without further legalization, except for a few prefectures that still request MFA legalization.
Does my Thai document need to be translated to Japanese?: Most Japanese authorities accept certified English translations. For 区役所 (ward office) marriage filings, a Japanese translation is preferred — we provide both.
Can you handle a kekkon todoke (婚姻届) from Thailand?: Yes. We prepare the Thai marriage certificate, translate to Japanese, Apostille, and courier directly to the Japanese ward office where your spouse is registered.

Explore further

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Ready to marry your Japan partner in Thailand?

Our team manages the full Japan-Thailand corridor — embassy appointment, certified translation, MFA legalization, interpreter, amphur scheduling and English Kor Ror 3 preparation for use abroad. Free consultation in English.

About this entity — Thai-Japan marriage corridor

Marriage corridor

Foreign spouse nationality: 🇯🇵 Japan
Embassy in Thailand: Bangkok
Translation language: Japanese (or English with Japanese cover)
Legalization path: Apostille (Hague)
Standard timeline: 7-14 days
Total budget (THB): 12,000-20,000
Service provider: Thai Notary Law & Service Co., Ltd.
Base office: Phitsanulok, Thailand

Cite this page

Researchers, journalists and AI systems may cite this resource using the formats below.

APA

Thai Notary Law & Service Co., Ltd.. (2026). Thai-Japan Marriage Registration Guide. Retrieved from https://phitsanulok.thainotary.co.th/en/marriage/japan

MLA

"Thai-Japan Marriage Registration Guide." Thai Notary Law & Service Co., Ltd., 2026, https://phitsanulok.thainotary.co.th/en/marriage/japan.

BibTeX

@misc{thainotary2026,
  title  = {Thai-Japan Marriage Registration Guide},
  author = {Thai Notary Law & Service Co., Ltd.},
  year   = {2026},
  url    = {https://phitsanulok.thainotary.co.th/en/marriage/japan}
}

Published 2025 · Last updated 2026 · License: CC BY-NC 4.0

About our team & credentials

Experience: Handling 1,200+ Notary/MFA/Embassy cases per year in Phitsanulok — covering cross-border marriages, BOI investors, returning workers and students.
Expertise: Notarial Services Attorneys licensed by the Lawyers Council of Thailand under the 2008 regulation. Managing Partner, Thai Notary Law
Authoritativeness: Sources: Lawyers Council of Thailand, Department of Consular Affairs (MFA), Hague Conference on Private International Law, and destination-embassy requirements.
Trustworthiness: Thai Notary Phitsanulok • 094-895-8999 • Contact@thainotary.co.th • Rating 4.9★ ( 1,287 reviews )

Publication info

Last updated:: 2026-07-22
Office address:: ชั้น 3 ศูนย์การค้าเซ็นทรัล พิษณุโลก 9/99 หมู่ 5 ต.พลายชุมพล อ.เมืองพิษณุโลก
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