ＤＥＮＴＡＬ ＯＦＦＩＣＥ ＯＴＡＮＩ (Dental Office Otani)
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
Positions by Rating Profile
- Overall Transparency & Trust#1555.6/100
- Best for Expats#1752.5/100
- Best for Dental Implants#1150/100
- Best for Emergency Dental Carenot ranked
- Best Price Transparency#1639.1/100
- Best English-speaking Clinics#1656.7/100
- Best for Families / Childrennot ranked
- Sleep Dentistry (GA / deep sedation)#355.6/100
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) — General anaesthesia / deep sedation documented Services page: surgery is performed under sedation in cooperation with an anaesthetist (麻酔医との連携により鎮静下での手術). [s3]
Summary
Umeda practice led by Dr. Takafumi Otani, a US board-trained prosthodontist (University of Washington MSD, formerly in private practice in Seattle, clinical associate professor at Osaka University) who opened the clinic in 2017 under 医療法人禄士会. The clinic documents a separate operating room for implant and periodontal surgery with patient monitoring, an in-house dental laboratory with a full-time technician, a Carl Zeiss microscope, dental CT and digital radiography, and states that surgery is carried out under sedation in cooperation with an anaesthetist. It publishes a detailed treatment-philosophy and services site in Japanese with a short English mirror, but no fees at all.
Strengths
- Information Transparency: 20 of 20 points.
- No red flags identified in public sources.
Weaknesses
- Price Transparency: 0 of 3 verifiable points (missing: prices or price ranges published)
- AI & Search Visibility: 2 of 10 verifiable points (missing: mentioned for: best dentist Japan; mentioned for: English speaking dentist Japan; mentioned for: dental implants Japan; mentioned for: emergency dentist Japan; mentioned for: Japan dental clinic for expats; structured data on website; dedicated service pages)
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
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 大谷 恭史 (Takafumi Otani), 院長, 歯学博士 and US board-trained prosthodontist, is named with a full CV and publication list. [s2] | 3/3 |
| ✓ | Dentist specializations listed US prosthodontics residency (University of Washington), DDS/MSD/PhD, clinical associate professor at Osaka University; the site also states an implant-certified dentist trained in the United States is on staff full time. [s2] | 2/2 |
| ✓ | Real clinic photos Gallery section with photographs of the treatment rooms, operating room, counselling room and in-house laboratory. [s2] | 2/2 |
| ✓ | Service list published Caries, endodontics, periodontal treatment, periodontal surgery and regeneration, prosthetics for missing teeth, implants, aesthetic prosthetics and whitening. [s3] | 3/3 |
| ✓ | Clear contact details Phone, e-mail address and address on every page. [s1] | 2/2 |
| ✓ | English website version English mirror of the home page; the detailed treatment pages are Japanese only. [s4] | 2/2 |
| ✓ | Address and map published [s1] | 2/2 |
Price Transparency
Whether patients can estimate costs before visiting. Published price ranges count; exact prices are not required.
| ✗ | Prices or price ranges published The site has three content sections (about, services, English) and no fee page; no figures are published. [s1] [s3] | 0/3 |
| ? | Cleaning price listed | 0/2 |
| ? | Filling price listed | 0/2 |
| ? | Crown price listed | 0/2 |
| ? | Implant price listed | 0/2 |
| ? | Consultation price listed | 0/2 |
| ? | X-ray / imaging price listed | 0/2 |
Reputation & Reviews
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: 47 five-star, 0 four-star, 0 three-star, 0 two-star, 2 one-star. The buckets sum to 49, matching the 49 in the place-page header exactly, and the weighted mean 4.837 reproduces the published 4.8. [gmp1] | 5/6 |
| ◐ | Google review volume Read live on 2026-09-06 from the place-page header; the star histogram sums to the same figure. [gmp1] | 1/3 |
| ✓ | 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 No review in the visible sample is critical; the histogram carries two one-star ratings in 49 (4 per cent). 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 | 0/1 |
| ? | TripAdvisor presence | 0/0.5 |
| ? | Other review platforms | 0/0.5 |
Medical Infrastructure
The range of publicly documented equipment and services. This measures documented availability, not clinical quality.
| ✓ | On-site X-ray Digital radiography with immediate transfer to chairside monitors. [s2] | 2/2 |
| ✓ | CBCT (3D imaging) Dental cone-beam CT documented on the facility page. [s2] | 2/2 |
| ✓ | Implantology [s3] | 2/2 |
| ✗ | Orthodontics Not on the published service list; declared specialties in the 近畿厚生局 designation list are 歯科 and 歯科口腔外科 only. [s3] [reg4] | 0/2 |
| ✓ | Oral surgery Periodontal surgery, bone and soft-tissue grafting, carried out in a dedicated operating room. [s3] [s2] | 2/2 |
| ✗ | Pediatric dentistry Not on the published service list; 小児歯科 is not among the declared specialties. [s3] [reg4] | 0/1.5 |
| ? | Emergency care | 0/1.5 |
| ✓ | Works with international patients English page and a team the clinic describes as trained and licensed in the United States. [s4] [s2] | 2/2 |
Communication & Service
How easy it is to contact the clinic, get answers, and book - especially for international patients.
| ? | WhatsApp / LINE available | 0/2 |
| ? | Response speed | 0/1.5 |
| ✓ | English spoken English page in the clinic's own voice; principal practised in Seattle and holds a US dental licence. [s4] [s2] | 2.5/2.5 |
| ? | Pre-visit consultation possible | 0/1.5 |
| ✓ | Clear service explanations [s3] | 1/1 |
| ✓ | Convenient opening hours Weekdays 10:00-14:00 and 16:00-20:00, Saturdays 9:00-13:00 and 14:00-17:00 — evening and Saturday cover, published on the home page. [s1] | 1.5/1.5 |
AI & Search Visibility
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 Osaka" (named results were DUO Specialists Dental Clinic, Minatomachi Dental Clinic, SMILE PLAN, Tokuoka Dental Clinic, Esaka Dental Clinic). [q1] | 0/1 |
| ✗ | Mentioned for: English speaking dentist Japan WebSearch 2026-09-06: not among results for "English speaking dentist Osaka" (named results were Yutaka Dental Clinic, Minatomachi Dental Clinic, Osaka Dental Clinic, NINE DENTAL CLINIC, Seo Dental Clinic, OsakaDentist.com). [q2] | 0/1 |
| ✗ | Mentioned for: dental implants Japan WebSearch 2026-09-06: not among results for "dental implants Osaka" (named results were Osaka Dental University Hospital, ZAGA Center Osaka, Smile Plan Dental Group, DUO Specialists Dental Clinic). [q3] | 0/1 |
| ✗ | Mentioned for: emergency dentist Japan WebSearch 2026-09-06: not among results for "emergency dentist Osaka" (named results were Osaka Shinsaibashi Evening Dental, NINE DENTAL CLINIC, Yanagida Dental Clinic/OsakaDentist.com, Fujita Dental Clinic, Esaka Dental Clinic). [q4] | 0/1 |
| ✗ | Mentioned for: Japan dental clinic for expats WebSearch 2026-09-06: not among results for "Osaka dental clinic for expats" (named results were Y & Y Dental Clinic, Kono Dental Clinic, Minatomachi Dental Clinic, NINE DENTAL Clinic, OsakaDentist.com, Tokuoka Dental Clinic). [q5] | 0/1 |
| ✗ | Structured data on website No JSON-LD or microdata found in the served HTML. [s1] | 0/1.5 |
| ✓ | Google indexing quality own domain doo.or.jp takes the top two results plus its about and treatment pages (4 of 12), ahead of the Haisha-Yoyaku and EPARK booking directories and Osaka municipal provider lists (SearXNG opnxng.com 2026-09-07) [giq1] | 2/2 |
| ✗ | Dedicated service pages All treatments are described on a single tabbed page. [s3] | 0/1.5 |
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 41-07929 — designated 保険医療機関 (dental clinic), 指定年月日 平成29年3月1日 (2017-03-01), 標榜科目 歯科・歯科口腔外科, per the 近畿厚生局 Osaka dental designation list as of 令和8年9月1日 (2026-09-01); founder 医療法人禄士会 理事長 大谷 朋弘, managing dentist 大谷 恭史. Also registered as 歯科診療所 in MHLW 医療情報ネット under facility code 3270081040, record last updated 2026/1/22. [reg1] [reg4] [reg2]
Dentists & professional licences
| Dentist | Specialization | Licence No. |
|---|---|---|
| 大谷 恭史 (Takafumi Otani) [s2] [reg1] [reg3] [reg4] | Principal and managing dentist; 歯学博士, University of Washington MSD in prosthodontics, US dental licence, clinical associate professor at Osaka University Faculty of Dentistry | Registered 歯科医師 — MHLW 医師等資格確認検索, year of registration 平成16年 (2004). The register publishes no registration number. |
Red Flags
No red flags identified in the public sources we reviewed.
Data We Could Not Verify
- Price Transparency: Cleaning price listed
- Price Transparency: Filling price listed
- Price Transparency: Crown price listed
- Price Transparency: Implant price listed
- Price Transparency: Consultation price listed
- Price Transparency: X-ray / imaging price listed
- Reputation & Reviews: Active Facebook presence
- Reputation & Reviews: TripAdvisor presence
- Reputation & Reviews: Other review platforms
- Medical Infrastructure: Emergency care
- Communication & Service: WhatsApp / LINE available
- 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 | http://www.doo.or.jp/ |
|---|---|
| Phone | +81 6-4802-0070 |
| Google Maps | Map listing |
| Address | 〒530-0012 大阪府大阪市北区芝田2-2-1 OSAKA UK GATE 3F (2-2-1 Shibata, Kita-ku, Osaka 530-0012) |
Contact details are provided for identification only and may change; verify with the clinic directly.
Sources
| ID | Source | What it supports | Accessed |
|---|---|---|---|
| s1 | http://www.doo.or.jp/ | Clinic name, address, opening hours, contact e-mail, insurance acceptance | 2026-09-04 |
| s2 | http://www.doo.or.jp/about/ | Named principal with CV, clinic philosophy, facility and equipment (operating room, CT, digital X-ray, microscope, in-house laboratory), premises photographs | 2026-09-04 |
| s3 | http://www.doo.or.jp/whatwedo/ | Published service list and sedation arrangements | 2026-09-04 |
| s4 | http://www.doo.or.jp/en/ | English version of the site | 2026-09-04 |
| reg1 | https://www.iryou.teikyouseido.mhlw.go.jp/znk-web/juminkanja/S2430/… | MHLW 医療情報ネット (ナビイ) — the statutory facility register kept under 医療法第6条の3: official name, operator 医療法人禄士会, managing dentist 大谷 恭史, address, phone, last updated 2026/1/22 | 2026-09-04 |
| reg2 | https://data.e-gov.go.jp/data/dataset/iryou_teikyouseido_mhlw | MHLW open data 03-1_dental_facility_info_20251201.csv (snapshot 2025-12-01) — facility ID 2733270081040, official name, address and website | 2026-09-04 |
| reg3 | https://licenseif.mhlw.go.jp/search_isei/jsp/top.jsp | MHLW 医師等資格確認検索 (dentist register), snapshot 2026-09-04 | 2026-09-04 |
| reg4 | https://kouseikyoku.mhlw.go.jp/kinki/tyousa/shinkishitei.html | 近畿厚生局 Osaka dental designation list as of 2026-09-01 (5,240 institutions read to the last row): 医療機関コード, founder, managing dentist, declared specialties and 指定年月日 | 2026-09-04 |
| gmp1 | https://www.google.com/maps/place/DENTAL+OFFICE+OTANI/@34.705305,13… | 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 Osaka | AI/search visibility scout — canonical query | 2026-09-06 |
| q2 | search:English speaking dentist Osaka | AI/search visibility scout — canonical query | 2026-09-06 |
| q3 | search:dental implants Osaka | AI/search visibility scout — canonical query | 2026-09-06 |
| q4 | search:emergency dentist Osaka | AI/search visibility scout — canonical query | 2026-09-06 |
| q5 | search:Osaka dental clinic for expats | AI/search visibility scout — canonical query | 2026-09-06 |
| giq1 | search:DENTAL OFFICE OTANI 梅田 大阪 Dental Office Otani Umeda | own domain doo.or.jp takes the top two results plus its about and treatment pages (4 of 12), ahead of the Haisha-Yoyaku and EPARK booking directories and Osaka municipal provider lists | 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: geo added from the MHLW 医療情報ネット open data (snapshot 2025-12-01, facility ID 2733270081040); the 近畿厚生局 Osaka dental list re-downloaded and re-read to the last of its 5,240 rows, entry 3164 (医療機関コード 41-07929, 指定 平29.3.1, 開設者 医療法人禄士会 理事長 大谷 朋弘, 管理者 大谷 恭史) reproduced exactly; the principal's register entry (平成16年) reproduced live. |
| 2026-09-04 | Initial data collection for the Japan Dental Transparency & Trust Index: verified against the clinic's own website, the 近畿厚生局 health-insurance designation list, the MHLW 医療情報ネット facility register and its open-data twin, and the MHLW dentist qualification search. |
A question or a correction?
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