🇯🇵 Japan · Thai Naturalisation (Citizenship)
Thai Naturalisation (Citizenship) — Criminal Record Certificate for Japan Nationals in Thailand
We prepare the complete criminal-record packet a Japan national needs to file Thai Naturalisation (Citizenship) in Thailand. Every step — from the fingerprint appointment at the Royal Thai Police Criminal Records Division to the sealed Apostille packet accepted by Special Branch Bureau → Ministry of Interior → Royal Command — is managed by one case attorney.
- Package from
- ฿28,000
- Timeline
- 25–45 biz days
- Home authority
- Prefectural Police (Keisatsu) via Japanese Embassy Bangkok
- Legalisation
- Bidirectional — Thai MFA/Apostille + home-country Apostille/consular
Why this certificate is needed
Naturalisation as a Thai citizen under Nationality Act. Under Nationality Act B.E. 2508 (as amended) §10–12, Special Branch Bureau → Ministry of Interior → Royal Command requires evidence that the applicant has no disqualifying criminal history — both in Thailand (where the applicant currently resides) and, for Japan nationals, in the country of nationality. The certificate must be current (issued within 90 days of filing for most desks; 60 days for BOI/Immigration). For Japan applicants this typically means combining a Thai RTP-1 with a Prefectural Police (Keisatsu) via Japanese Embassy Bangkok certificate; both must be translated (Thai + English) and legalised.
The specific requirement stack for Thai Naturalisation (Citizenship) makes this filing more complex than a generic tourist-visa criminal check. Special Branch Bureau → Ministry of Interior → Royal Command refuses packets missing any of: (a) the correct receiving-authority cover form; (b) certified translation in the accepted language pair for Japan documents (TH → PLUS-EN); (c) the legalisation chain required by bidirectional — thai mfa/apostille + home-country apostille/consular. We build every packet to survive first-pass acceptance.
The end-to-end service (7 layers)
1 · Thai RTP-1 issuance
You will attend the Royal Thai Police Criminal Records Division (Muang Thong Thani) with passport, TM.30 residence proof and current visa. As a Japan national ordinarily resident in Thailand you qualify for RTP-1 issuance after 6 months of continuous residence. We schedule the fingerprint appointment, prepare the TR-16 form, and collect the certificate on the 5th business day.
2 · Home-country CBC via Prefectural Police (Keisatsu) via Japanese Embassy Bangkok
We liaise directly with Prefectural Police (Keisatsu) via Japanese Embassy Bangkok using the Embassy fingerprint + application → Japan Ministry of Justice → sealed envelope channel. Typical turnaround is 35–60 business days. For Thai Naturalisation (Citizenship) filings we prepare the request cover letter in the format the receiving authority accepts, and courier the sealed envelope back to Thailand.
3 · Certified translation
A Thai + English bilingual certified translation is prepared, matched to the receiving authority's template for Thai Naturalisation (Citizenship).
4 · Legalisation chain
Bidirectional — Thai MFA/Apostille + home-country Apostille/consular. Because Thailand acceded to the Hague Apostille Convention (effective 2026), the Legalisation Division at Chaeng Watthana affixes an Apostille for Japan filings where the Hague Convention applies. The full chain — RTP-1 → certified translation → Apostille — is delivered as one sealed packet.
5 · Receiving authority: Special Branch Bureau → Ministry of Interior → Royal Command
Naturalisation as a Thai citizen under Nationality Act. Legal basis: Nationality Act B.E. 2508 (as amended) §10–12. We submit the packet to the correct desk, obtain the acceptance receipt and monitor case status until issuance of the underlying document (Thai Naturalisation (Citizenship)).
6 · Notary Public certification
Where required for onward use overseas (particularly for Japan home-country filings), our Notarial Services Attorney (Lawyers Council of Thailand, Lic. No. 1851/2557) applies the notarial seal and signature to the sealed packet, satisfying the "notarised copy" requirement of most third-country immigration authorities.
7 · Case management
Single case manager end-to-end. You receive a shared case folder, courier tracking, weekly status update and a compliance audit trail suitable for tribunal or immigration review. Deadline compliance is guaranteed within our stated 25–45-day SLA.
Country-specific practice notes — Japan
Home authority: Prefectural Police (Keisatsu) via Japanese Embassy Bangkok.
Ordering route: Embassy fingerprint + application → Japan Ministry of Justice → sealed envelope.
Typical home-country turnaround: 35–60 business days.
Legalisation of the home certificate: Apostille (Hague Convention).
Translation direction: Bilingual Thai + English certified translation.
Thai RTP-1 acceptance abroad: Japan authorities accept a Thai-issued RTP-1 with Apostille and certified translation.
Frequently asked questions
How long does a Japan national wait for a Thai RTP-1 when applying for Thai Naturalisation (Citizenship)?
From fingerprint appointment to sealed certificate: 5 business days. Full end-to-end packet (RTP-1 + translation + legalisation) for Thai Naturalisation (Citizenship): 25–45 business days. We manage the appointment, translation and legalisation as a single workflow.
Does Special Branch Bureau → Ministry of Interior → Royal Command accept a Japan-issued police certificate directly?
Yes — but only when it carries the correct legalisation. For Japan nationals we obtain the certificate via Prefectural Police (Keisatsu) via Japanese Embassy Bangkok using the Embassy fingerprint + application → Japan Ministry of Justice → sealed envelope channel, then apply the home-country Apostille and a certified Thai translation.
What is the total cost for a Japan applicant?
Packages start from ฿28,000 and include government fees, translation, legalisation and courier. Optional add-ons (embassy authentication, notarisation) are quoted separately after the case review.
Can we begin without the applicant travelling to Bangkok?
Yes. We accept a signed power of attorney (POA) — for Japan nationals we provide a bilingual POA template that satisfies both Thai RTP fingerprint requirements and Prefectural Police (Keisatsu) via Japanese Embassy Bangkok ID verification.
What happens if the Japan home-country certificate arrives with errors?
We check every certificate against the receiving-authority template on receipt. If Prefectural Police (Keisatsu) via Japanese Embassy Bangkok issues a document with a misspelt name, wrong date of birth or missing signature, we open a correction request the same day at no additional professional fee — you only cover the reissue government fee.
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