安増歯科医院 (Yasumasu Dental Office)
According to our open methodology, this clinic scored 55.6/100 for transparency, reputation, service accessibility, and digital visibility.
Overall rank: #15 of 21 ranked clinics · Last checked: 6 September 2026
55.6/100
Positions by Rating Profile
- Overall Transparency & Trust#1555.6/100
- Best for Expats#1850.3/100
- Best for Dental Implants#1347.5/100
- Best for Emergency Dental Care#749.5/100
- Best Price Transparency#1838.6/100
- Best English-speaking Clinics#1754.5/100
- Best for Families / Childrennot ranked
- Sleep Dentistry (GA / deep sedation)not ranked
General Anaesthesia & Deep Sedation
Whether the clinic documents treatment under general anaesthesia or deep / twilight sedation — "sleep dentistry", where the patient is asleep and unaware (does not feel, see, or hear the procedure). Ordinary conscious sedation, where the patient stays awake and responsive, does not count here. This is informational and does not affect the transparency score.
- ? General anaesthesia / deep sedation (sleep dentistry) — Not verified
Summary
Single-dentist periodontal and implant practice in central Tenjin, moved from Munakata where the family practice has run since 1976 and incorporated in 2021. The director is a US-trained periodontist and Diplomate of the American Board of Periodontology; the site has a full English page, states that walk-in emergency patients are welcome and accepts national health insurance, but publishes no prices.
Strengths
- Information Transparency: 20 of 20 points.
- No red flags identified in public sources.
Weaknesses
- Price Transparency: 0 of 15 verifiable points (missing: prices or price ranges published; cleaning price listed; filling price listed; crown price listed; implant price listed; consultation price listed; x-ray / imaging price listed)
Score Breakdown
Every criterion below is scored from public sources. ✓ verified yes · ✗ verified no / not found · ◐ partial · ? unverified (scores 0, not a negative finding).
Information Transparency
20 / 20
Whether basic facts about the clinic - its team, premises, services, and location - are publicly verifiable.
| ✓ | Has a working website [s1] | 4/4 |
| ✓ | Dentist names listed Director 安増 一志 (furigana やすます かずし; the clinic publishes the romanisation Kazushi Yasumasu). He is the only dentist named; the other named staff are a dental hygienist and a receptionist. [s2] | 3/3 |
| ✓ | Dentist specializations listed MSD, Indiana University School of Dentistry Graduate Periodontics; Diplomate, American Board of Periodontology; 日本臨床歯周病学会 歯周病認定医; ITI Fellow. [s2] [s3] | 2/2 |
| ✓ | Real clinic photos Own-hosted photographs of the surgery and treatment work on the clinic's site. [s1] | 2/2 |
| ✓ | Service list published [s4] | 3/3 |
| ✓ | Clear contact details Phone, address and booking link in the site header; the phone matches the Kyushu Regional Bureau register entry. [s1] | 2/2 |
| ✓ | English website version [s3] | 2/2 |
| ✓ | Address and map published [s5] | 2/2 |
Price Transparency
0 / 15
Whether patients can estimate costs before visiting. Published price ranges count; exact prices are not required.
| ✗ | Prices or price ranges published No price page and no figure on the home, services, information or English pages. [s1] [s3] [s4] [s5] | 0/3 |
| ✗ | Cleaning price listed [s4] | 0/2 |
| ✗ | Filling price listed [s4] | 0/2 |
| ✗ | Crown price listed The ceramic-restoration page describes the work and a five-year free repair warranty but publishes no price. [s4] | 0/2 |
| ✗ | Implant price listed [s4] | 0/2 |
| ✗ | Consultation price listed The English page describes payment methods but publishes no consultation fee. [s3] | 0/2 |
| ✗ | X-ray / imaging price listed [s4] | 0/2 |
Reputation & Reviews
12.5 / 20
Public review signals. The Google rating is adjusted with a Bayesian prior (rating 4.0, weight 25) so a 5.0 from a handful of reviews does not outrank a 4.8 from hundreds.
| ◐ | Google rating (Bayesian-adjusted) Star histogram read live on 2026-09-06 from the place page: 83 five-star, 2 four-star, 2 three-star, 2 two-star, 7 one-star. The buckets sum to 96, matching the 96 in the place-page header exactly, and the weighted mean 4.583 reproduces the published 4.6. [gmp1] | 4/6 |
| ◐ | Google review volume Read live on 2026-09-06 from the place-page header; the star histogram sums to the same figure. [gmp1] | 1.5/3 |
| ✓ | Review recency The newest review visible is 3 months old, which proves the within-3-months bucket and no better. Sample: the 3 reviews Google Maps renders on the place page in its own relevance order. The Newest sort does not open to the extension (re-tested on this run by opening the Reviews tab and scrolling the panel, which returned the same three reviews), so no fresher slice is available. [gmp1] | 3/3 |
| ✗ | Clinic responds to reviews No owner reply appears under any visible review. Sample: the 3 reviews Google Maps renders on the place page in its own relevance order. The Newest sort does not open to the extension (re-tested on this run by opening the Reviews tab and scrolling the panel, which returned the same three reviews), so no fresher slice is available. [gmp1] | 0/2 |
| ✓ | No recurring complaints One critical review is readable, three months old, and it is worth quoting the substance: a tourist without Japanese health insurance says he was told before any treatment that a 27,000 yen registration fee or deposit had to be paid first. That is a single account of a charging policy rather than a repeated clinical theme. The histogram carries nine ratings of two stars or below out of 96 (9 per cent) outside the visible sample, so this false rests on the sample. Sample: the 3 reviews Google Maps renders on the place page in its own relevance order. The Newest sort does not open to the extension (re-tested on this run by opening the Reviews tab and scrolling the panel, which returned the same three reviews), so no fresher slice is available. [gmp1] | 2/2 |
| ✓ | No suspicious review patterns Histogram shape, spread of wording and dates, and reviewer-account variety show no sign of manipulation. Sample: the 3 reviews Google Maps renders on the place page in its own relevance order. The Newest sort does not open to the extension (re-tested on this run by opening the Reviews tab and scrolling the panel, which returned the same three reviews), so no fresher slice is available. [gmp1] | 2/2 |
| ✗ | Active Facebook presence The clinic's site links Instagram (@yasumasu_dent) but no Facebook page. [s1] | 0/1 |
| ? | TripAdvisor presence | 0/0.5 |
| ? | Other review platforms | 0/0.5 |
Medical Infrastructure
7.5 / 15
The range of publicly documented equipment and services. This measures documented availability, not clinical quality.
| ? | On-site X-ray | 0/2 |
| ? | CBCT (3D imaging) | 0/2 |
| ✓ | Implantology [s4] | 2/2 |
| ✗ | Orthodontics Orthodontics appears nowhere in the clinic's published service list, and the only specialty declared in its register entry is 歯科. [s4] [reg1] | 0/2 |
| ✓ | Oral surgery Periodontal regenerative surgery, aesthetic periodontal surgery and implant surgery. [s4] | 2/2 |
| ? | Pediatric dentistry | 0/1.5 |
| ✓ | Emergency care The site states urgent patients are seen, and the English page adds that walk-in patients seeking emergency treatment are welcome. [s1] [s3] | 1.5/1.5 |
| ✓ | Works with international patients English page states the practice assists the English-speaking community and maintains a referral network of US-trained English-speaking specialists; it also states plainly that it cannot treat patients who speak neither English nor Japanese and does not accept phone-based translation. [s3] | 2/2 |
Communication & Service
3.5 / 10
How easy it is to contact the clinic, get answers, and book - especially for international patients.
| ✗ | WhatsApp / LINE available No LINE or WhatsApp channel; contact is by phone or online booking. [s1] | 0/2 |
| ? | Response speed | 0/1.5 |
| ✓ | English spoken "Dr. Kazushi Yasumasu speaks fluent English". [s3] | 2.5/2.5 |
| ? | Pre-visit consultation possible | 0/1.5 |
| ✓ | Clear service explanations Each service page walks through the treatment steps with case examples. [s4] | 1/1 |
| ✗ | Convenient opening hours Weekdays 9:30-13:30 and 14:30-18:00; Saturdays only "on occasion" 9:00-13:00 and 14:00-16:00; closed Sundays and public holidays, plus the Bon and New Year periods. [s3] | 0/1.5 |
AI & Search Visibility
6.5 / 10
Whether the clinic is discoverable when patients search - including via AI assistants. Checked with fixed queries: "best dentist Japan", "English speaking dentist Japan", "dental implants Japan", "emergency dentist Japan", "Japan dental clinic for expats".
| ✗ | Mentioned for: best dentist Japan WebSearch 2026-09-06: not among results for "best dentist Fukuoka" (named results were Shinozaki Dental Clinic, Hakata Chuo Dental Clinic, ALLON4 ZYGOMA Clinic, Yamamichi Dental Clinic). [q1] | 0/1 |
| ✓ | Mentioned for: English speaking dentist Japan [sq1] | 1/1 |
| ✗ | Mentioned for: dental implants Japan WebSearch 2026-09-06: not among results for "dental implants Fukuoka" (named results were Fukuoka Dental College Hospital, ALLON4 ZYGOMA Clinic, Yamamichi Dental Clinic, Kasuga Dental Clinic, Hakata Chuo Dental Clinic, Hachishika Clinic). [q2] | 0/1 |
| ✓ | Mentioned for: emergency dentist Japan WebSearch 2026-09-06: named and described ("walk-in patients seeking dental treatment in an emergency are welcome. Dr. Kazushi Yasumasu speaks fluent English") in the answer for "emergency dentist Fukuoka", citing its own site yasumasu-dent.com/english/. [q3] | 1/1 |
| ✓ | Mentioned for: Japan dental clinic for expats WebSearch 2026-09-06: named and described ("Dr. Kazushi Yasumasu speaks fluent English...Periodontist trained in the United States") in the answer for "Fukuoka dental clinic for expats", citing its own site yasumasu-dent.com/english/. [q4] | 1/1 |
| ✗ | Structured data on website The JSON-LD blocks are BreadcrumbList and WebSite only; there is no LocalBusiness or Dentist markup. [s1] | 0/1.5 |
| ✓ | Google indexing quality own domain yasumasu-dent.com takes the top result plus its clinic-info and English pages (3 of 12); the rest of the page is the health ministry entry, the Fukuoka dental association and Japanese clinic directories (Caloo, Hospita, Nihon-Byouin) (SearXNG opnxng.com 2026-09-07) [giq1] | 2/2 |
| ✓ | Dedicated service pages Separate pages for periodontal treatment, regenerative therapy, maintenance, ceramic restoration, implant treatment, aesthetic periodontal surgery and whitening. [s4] | 1.5/1.5 |
Licensing & Credentials
Whether the clinic publishes its operating licence and the dentists working there together with their professional licence numbers. A verified “not published” is recorded as a red flag; data we have not checked yet is shown as unverified and carries no penalty.
Clinic operating licence: 医療機関コード 103,632,2 — designated health-insurance dental clinic (保険医療機関), designated 2021-04-01. Operator: 医療法人安増歯科医院, representative director 安増 一志; responsible dentist (管理者) 安増 一志. Declared specialty 歯科. Per the Kyushu Regional Bureau of Health and Welfare institution list, snapshot of 2026-08-01. Also recorded in the national medical-institution register (医療情報ネット) open data of 2025-12-01 as 医療法人 安増歯科医院. [reg1] [od1]
Dentists & professional licences
| Dentist | Specialization | Licence No. |
|---|---|---|
| 安増 一志 (Kazushi Yasumasu) [s2] [reg2] [reg1] | 院長 (director) and the clinic's 管理者; DDS Kyushu University; MSD, Indiana University School of Dentistry Graduate Periodontics (2007); Diplomate, American Board of Periodontology; 日本臨床歯周病学会 歯周病認定医; Fellow, International Team for Implantology | Registered 歯科医師 — MHLW 医師等資格確認検索, year of registration 平成13年 (2001). The register publishes no registration number. |
Red Flags
No red flags identified in the public sources we reviewed.
Data We Could Not Verify
- Reputation & Reviews: TripAdvisor presence
- Reputation & Reviews: Other review platforms
- Medical Infrastructure: On-site X-ray
- Medical Infrastructure: CBCT (3D imaging)
- Medical Infrastructure: Pediatric dentistry
- Communication & Service: Response speed
- Communication & Service: Pre-visit consultation possible
Unverified items score 0 points but are not treated as negative findings. If you can document any of them, please send a correction.
Contact Information
| Website | https://www.yasumasu-dent.com/ |
|---|---|
| Phone | +81 92-791-6095 |
| Google Maps | Map listing |
| Address | 2-7-14 Tenjin, Chuo-ku, Fukuoka 810-0001, Japan (Ichigo Tenjin City Bldg. 2F) |
Contact details are provided for identification only and may change; verify with the clinic directly.
Sources
| ID | Source | What it supports | Accessed |
|---|---|---|---|
| s1 | https://www.yasumasu-dent.com/ | Clinic name, phone, Instagram link, urgent-patient statement, structured-data check, own premises photography | 2026-09-04 |
| s2 | https://www.yasumasu-dent.com/staff/ | Director's name with furigana and romanisation, US specialist credentials, society memberships and publication record; other named staff | 2026-09-04 |
| s3 | https://www.yasumasu-dent.com/english/ | English-language page, English-speaking statement, walk-in emergency policy, opening hours and payment methods | 2026-09-04 |
| s4 | https://www.yasumasu-dent.com/services/ | Published service list and per-service pages; absence of prices | 2026-09-04 |
| s5 | https://www.yasumasu-dent.com/information/ | Address, embedded Google Maps place reference and clinic details | 2026-09-04 |
| reg1 | https://kouseikyoku.mhlw.go.jp/kyushu/gyomu/gyomu/hoken_kikan/index… | Kyushu Regional Bureau of Health and Welfare コード内容別医療機関一覧表, Fukuoka Prefecture dental workbook (r8_08_shika_fukuoka_02.xlsx), snapshot 2026-08-01: entry 881, 医療機関コード 103,632,2, operator, responsible dentist, designation date and declared specialty | 2026-09-04 |
| reg2 | https://licenseif.mhlw.go.jp/search_isei/jsp/top.jsp | MHLW 医師等資格確認検索 (national dentist register), full-name search for 安増 一志; register data as of 2026-09-04 | 2026-09-04 |
| od1 | https://data.e-gov.go.jp/data/dataset/iryou_teikyouseido_mhlw | MHLW 医療情報ネット open data, 03-1_dental_facility_info_20251201.csv, snapshot 2025-12-01, record 4030001036322: official name, address, English transliteration Yasumasu Dental Office and coordinates 33.589978 / 130.396163 | 2026-09-04 |
| sq1 | search:English speaking dentist Fukuoka dental clinic | AI/search visibility scout 2026-09-04 — clinic named in the answer and in the cited English-friendly dentist listings | 2026-09-04 |
| gmp1 | https://www.google.com/maps/place/Yasumasu+Dental+Office/@33.589979… | Live Google Maps place page read in a browser: rating, review count, star histogram, review dates, owner replies, listing website, phone, address and pin coordinates | 2026-09-06 |
| q1 | search:best dentist Fukuoka | AI/search visibility scout — canonical query | 2026-09-06 |
| q2 | search:dental implants Fukuoka | AI/search visibility scout — canonical query | 2026-09-06 |
| q3 | search:emergency dentist Fukuoka | AI/search visibility scout — canonical query | 2026-09-06 |
| q4 | search:Fukuoka dental clinic for expats | AI/search visibility scout — canonical query | 2026-09-06 |
| giq1 | search:安増歯科医院 福岡 Yasumasu Dental Office Fukuoka | own domain yasumasu-dent.com takes the top result plus its clinic-info and English pages (3 of 12); the rest of the page is the health ministry entry, the Fukuoka dental association and Japanese clinic directories (Caloo, Hospita, Nihon-Byouin) | 2026-09-07 |
Change History
| Date | Change |
|---|---|
| 2026-09-06 | Combined browser pass (agent I-3, korea + japan): the Google Maps place page was opened in a real browser and read for rating, review count, star histogram, review recency, owner replies, complaint and manipulation reading, listing website, phone, address and pin coordinates; the country worklist rows that needed a rendering browser were worked through on the clinic's own channels. |
| 2026-09-04 | Adversarial verification pass 2026-09-04: the Kyushu Regional Bureau entry 881 (医療機関コード 103,632,2, 指定 令3.4.1, 医療法人安増歯科医院) and the director's register entry (平成13年) reproduced live; the whole site re-read and confirmed to carry no fee page and no LocalBusiness or Dentist markup; the coordinates re-checked against the open-data record and the ward cluster. |
| 2026-09-04 | Initial data collection for the Japan Dental Transparency & Trust Index: verified against the clinic's own site, the Kyushu Regional Bureau of Health and Welfare health-insurance institution list (snapshot 2026-08-01), the MHLW national dentist register and the MHLW medical-institution open data (snapshot 2025-12-01). |
A question or a correction?
Have a question, a suggestion, or a correction to this page? Get in touch — we read every message. Verified data corrections are reviewed against sources and applied with a public change-history entry.