さくらプラチナム歯科 (Sakura Platinum Dental Clinic)
According to our open methodology, this clinic scored 76.7/100 for transparency, reputation, service accessibility, and digital visibility.
Overall rank: #4 of 21 ranked clinics · Last checked: 6 September 2026
76.7/100
Positions by Rating Profile
- Overall Transparency & Trust#476.7/100
- Best for Expats#476.8/100
- Best for Dental Implantsnot ranked
- Best for Emergency Dental Care#375.7/100
- Best Price Transparency#283.5/100
- Best English-speaking Clinics#378.5/100
- 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
Late-hours Shibuya clinic aimed at walk-in and travelling patients: it is open every day of the year including public holidays, from midday until the early hours, one minute from Shibuya Station. It runs a fully English mirror site with an itemised private-care tariff — a flat JPY 33,000 standard treatment fee that includes the first examination and X-rays, plus per-item prices for fillings, crowns, extractions, pulp removal, bridges, mouthguards, whitening and cleaning — and requires a JPY 11,000 refundable deposit to confirm a booking. Booking and communication for non-Japanese speakers run through WhatsApp, LINE or a form, with translation-app support. The English site names only the director; the register records a different managing dentist.
Strengths
- Information Transparency: 20 of 20 points.
- Price Transparency: 13 of 15 points.
- Communication & Service: 8.5 of 10 points.
- No red flags identified in public sources.
Weaknesses
- AI & Search Visibility: 2.5 of 10 verifiable points (missing: mentioned for: best dentist Japan; mentioned for: English speaking dentist Japan; mentioned for: dental implants Japan; mentioned for: Japan dental clinic for expats; structured data on website; google indexing quality)
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 Yoshihisa Tajima is named and profiled on the clinic's own English site; no other treating dentist is named there. [s3] | 3/3 |
| ✓ | Dentist specializations listed Director's profile lists membership of the Japanese Society of Esthetic Dentistry, the Japanese Society of Oral Implantology and the Japan Society for Laser Dentistry; no board specialty is claimed. [s3] | 2/2 |
| ✓ | Real clinic photos [s4] | 2/2 |
| ✓ | Service list published General dentistry, cosmetic dentistry, in-office whitening, cleaning and late-night emergency care, each with its own page. [s2] | 3/3 |
| ✓ | Clear contact details [s4] | 2/2 |
| ✓ | English website version Complete English mirror of the site. [s1] | 2/2 |
| ✓ | Address and map published [s4] | 2/2 |
Price Transparency
13 / 15
Whether patients can estimate costs before visiting. Published price ranges count; exact prices are not required.
| ✓ | Prices or price ranges published Permanent English-language tariff: standard treatment fee JPY 33,000 plus itemised additional services, worked cost examples and a deposit policy. [s5] | 3/3 |
| ✓ | Cleaning price listed Cleaning and fluoride therapy JPY 33,000; cleaning plus in-office whitening JPY 66,000. [s5] | 2/2 |
| ✓ | Filling price listed Composite fillings from JPY 22,000; caries treatment from JPY 11,000. [s5] | 2/2 |
| ✓ | Crown price listed Dental crown from JPY 55,000; temporary crown from JPY 11,000; recementation from JPY 11,000. [s5] | 2/2 |
| ✗ | Implant price listed Implants are not among the services or fees the clinic publishes. [s2] [s5] | 0/2 |
| ✓ | Consultation price listed The JPY 33,000 standard fee is stated to be the minimum charge for the first visit and to include the initial examination. [s5] | 2/2 |
| ✓ | X-ray / imaging price listed Not priced separately: the JPY 33,000 standard first-visit fee is stated to include examination and X-rays. [s5] | 2/2 |
Reputation & Reviews
15.5 / 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: 99 five-star, 26 four-star, 6 three-star, 1 two-star, 28 one-star. The buckets sum to 160, matching the 160 in the place-page header exactly, and the weighted mean 4.044 reproduces the published 4. [gmp1] | 3/6 |
| ◐ | Google review volume Read live on 2026-09-06 from the place-page header; the star histogram sums to the same figure. [gmp1] | 2/3 |
| ✓ | Review recency The newest review visible is 2 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. A newest-first sort was not available; re-checking the Reviews tab returned the same three reviews, so no fresher slice is available. [gmp1] | 3/3 |
| ✓ | Clinic responds to reviews The owner replied to all three reviews Google renders. Sample: the 3 reviews Google Maps renders on the place page in its own relevance order. A newest-first sort was not available; re-checking the Reviews tab returned the same three reviews, so no fresher slice is available. [gmp1] | 2/2 |
| ✓ | No recurring complaints None of the three reviews Google renders is critical - all three describe emergency and late-hours treatment of visitors. The histogram is the widest spread in the country, 99/26/6/1/28, and 29 of 160 ratings (18 per cent) are two-star or one-star; none of them is inside the visible sample, so this false rests on the sample rather than on the base. Sample: the 3 reviews Google Maps renders on the place page in its own relevance order. A newest-first sort was not available; re-checking the Reviews tab returned the same three reviews, so no fresher slice is available. [gmp1] | 2/2 |
| ✓ | No suspicious review patterns An unusual shape - a large four-star bucket (26) alongside a large one-star bucket (28) - which is a divided base rather than a manipulation signature. Sample: the 3 reviews Google Maps renders on the place page in its own relevance order. A newest-first sort was not available; re-checking the Reviews tab returned the same three reviews, so no fresher slice is available. [gmp1] | 2/2 |
| ✓ | Active Facebook presence Facebook page "Sakura Platinum Dental Clinic Shibuya" (13 followers) with posts up to 2026-04-20, found under the clinic's name; its About section gives the clinic's address, phone and website. [sakura-platinum-dental-clinic-shibuya-tokyo-presence-2] | 1/1 |
| ✗ | TripAdvisor presence No TripAdvisor listing found via its search for "Sakura Platinum Dental Clinic Shibuya" and "Sakura Platinum Dental"; the clinic's site does not link to TripAdvisor (checked 2026-10-05). [sakura-platinum-dental-clinic-shibuya-tokyo-tripadvisor] [sakura-platinum-dental-clinic-shibuya-tokyo-tripadvisor-2] | 0/0.5 |
| ✓ | Other review platforms Reviewed on EPARK Dental (167 patient reviews, average 4.4, newest August 2026) and on Caloo (3 member reviews). [sakura-platinum-dental-clinic-shibuya-tokyo-presence] | 0.5/0.5 |
Medical Infrastructure
9.5 / 15
The range of publicly documented equipment and services. This measures documented availability, not clinical quality.
| ✓ | On-site X-ray X-rays included in the published first-visit fee. [s5] | 2/2 |
| ? | CBCT (3D imaging) | 0/2 |
| ✗ | Implantology Not offered on the clinic's published service list. [s2] | 0/2 |
| ✓ | Orthodontics Orthodontics is one of the clinic's declared specialties (hyobo shinryo kamoku) in the Kanto-Shinetsu Regional Bureau of Health and Welfare designation list; the clinic's own site describes general and cosmetic dentistry only. [reg4] | 2/2 |
| ✓ | Oral surgery Extractions including upper wisdom teeth; lower wisdom teeth are declined for same-day treatment because of nerve proximity. [s5] | 2/2 |
| ? | Pediatric dentistry | 0/1.5 |
| ✓ | Emergency care Late-night and same-day emergency treatment, open every day of the year. [s4] [s2] | 1.5/1.5 |
| ✓ | Works with international patients English-only booking and treatment track, translation-app support, private-care pricing for patients without Japanese health insurance. [s4] [s5] | 2/2 |
Communication & Service
8.5 / 10
How easy it is to contact the clinic, get answers, and book - especially for international patients.
| ✓ | WhatsApp / LINE available Booking and enquiries via WhatsApp or LINE. [s4] | 2/2 |
| ? | Response speed | 0/1.5 |
| ✓ | English spoken The clinic describes English communication supported by a translation app rather than by in-house fluency. [s4] | 2.5/2.5 |
| ✓ | Pre-visit consultation possible Booking and questions accepted in advance via WhatsApp, LINE or a form; treatment plan and fees explained after an in-person examination. [s4] | 1.5/1.5 |
| ✓ | Clear service explanations [s2] | 1/1 |
| ✓ | Convenient opening hours Open daily including public holidays, 12:00 until the early hours; one minute from Shibuya Station. [s4] | 1.5/1.5 |
AI & Search Visibility
2.5 / 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 [q1] | 0/1 |
| ✗ | Mentioned for: English speaking dentist Japan [q2] | 0/1 |
| ✗ | Mentioned for: dental implants Japan [q3] | 0/1 |
| ✓ | Mentioned for: emergency dentist Japan [q4] | 1/1 |
| ✗ | Mentioned for: Japan dental clinic for expats [q5] | 0/1 |
| ✗ | Structured data on website Two schema.org JSON-LD blocks, but only Organization, WebSite, WebPage, ImageObject and BreadcrumbList nodes; there is no Dentist, LocalBusiness or MedicalClinic markup, which is what this criterion asks for. [s1] | 0/1.5 |
| ✗ | Google indexing quality own domain (sakurashika24-3.com) appears only once, last among 8 results, behind X/Facebook/Instagram and four separate Japanese booking directories (web search 2026-09-07) [giq1] | 0/2 |
| ✓ | Dedicated service pages [s2] | 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: Institution code 13,8336,3 — designated health-insurance dental clinic, designation date 2017-03-01 (Heisei 29), declared specialties dentistry, orthodontics and oral and maxillofacial surgery, per the Kanto-Shinetsu Regional Bureau of Health and Welfare Tokyo dental designation list as of 2026-09-01 (Reiwa 8); founder and chairman of the operating medical corporation: Yoshihisa Tajima; managing dentist not named in Latin script on this card. Also registered as a dental clinic in the MHLW Healthcare Information Net under facility code 3133100114, record last updated 2026/2/13. [reg1] [reg4]
Dentists & MHLW register entry
| Dentist | Specialization | MHLW entry | Notes |
|---|---|---|---|
| 田島 義久 (Yoshihisa Tajima) [s3] [reg3] [reg4] | Director; chairman of the operating medical corporation; Nagasaki University Faculty of Dentistry | not published | Confirmed on the public register of 厚生労働省; registered since 2002, no licence number is published. |
| 中村 浩彦 [reg1] [reg3] [reg4] [sakura-platinum-dental-clinic-shibuya-tokyo-doclic] | Managing dentist of record for the Shibuya facility | not published | Confirmed on the public register of 厚生労働省, which publishes no licence number. |
Red Flags
No red flags identified in the public sources we reviewed.
Data We Could Not Verify
- Medical Infrastructure: CBCT (3D imaging)
- Medical Infrastructure: Pediatric dentistry
- Communication & Service: Response speed
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.sakurashika24-3.com/en/ |
|---|---|
| Phone | +81 3-6452-6588 |
| https://www.facebook.com/platinumsakura/ | |
| Google Maps | Map listing |
| Address | 〒150-0002 東京都渋谷区渋谷2-22-13 渋谷東口マイアミビル5階・6階 (5F-6F Miami Bldg., 2-22-13 Shibuya, Shibuya-ku, Tokyo 150-0002) |
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.sakurashika24-3.com/en/ | English site, clinic name, structured data | 2026-09-04 |
| s2 | https://www.sakuradentist.com/en/services-en | Published service list | 2026-09-04 |
| s3 | https://www.sakuradentist.com/en/director-en | Named director, education and society memberships | 2026-09-04 |
| s4 | https://www.sakuradentist.com/en/clinic-en | Address, opening hours, English and multilingual support, booking channels, premises photographs | 2026-09-04 |
| s5 | https://www.sakuradentist.com/en/fees-en | Itemised English-language fee list and deposit policy | 2026-09-04 |
| reg1 | https://www.iryou.teikyouseido.mhlw.go.jp/znk-web/juminkanja/S2430/… | MHLW Healthcare Information Net (Navii) — the statutory facility register kept under Medical Care Act Article 6-3: official name (a medical corporation operating as Sakura Platinum Dental Clinic), operator, managing dentist, foreign-language support recorded, last updated 2026/2/13 | 2026-09-04 |
| reg3 | https://licenseif.mhlw.go.jp/search_isei/jsp/top.jsp | MHLW physician/dentist qualification confirmation search (dentist register), snapshot 2026-09-04 | 2026-09-04 |
| reg4 | https://kouseikyoku.mhlw.go.jp/kantoshinetsu/chousa/shitei.html | Kanto-Shinetsu Regional Bureau of Health and Welfare Tokyo dental designation list as of 2026-09-01: institution code 13,8336,3, founder, managing dentist, declared specialties and designation date | 2026-09-04 |
| q1 | search:best dentist Tokyo | Canonical patient-visibility query, run 2026-09-04 | 2026-09-04 |
| q2 | search:English speaking dentist Tokyo | Canonical patient-visibility query, run 2026-09-04 | 2026-09-04 |
| q3 | search:dental implants Tokyo | Canonical patient-visibility query, run 2026-09-04 | 2026-09-04 |
| q4 | search:emergency dentist Tokyo | Canonical patient-visibility query, run 2026-09-04 | 2026-09-04 |
| q5 | search:Tokyo dental clinic for expats | Canonical patient-visibility query, run 2026-09-04 | 2026-09-04 |
| gmp1 | https://www.google.com/maps/place/Sakura+Platinum+Dental+Clinic+(Sh… | 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 |
| giq1 | search:さくらプラチナム歯科 渋谷 Sakura Platinum Dental Shibuya | own domain (sakurashika24-3.com) appears only once, last among 8 results, behind X/Facebook/Instagram and four separate Japanese booking directories | 2026-09-07 |
| sakura-platinum-dental-clinic-shibuya-tokyo-doclic | https://www.sakurashika24-3.com/doctor | Own-site Japanese 'Dentists & Staff Introduction' page (read 2026-09-10, reached via the Japanese-language top page linked from the English site) lists this dentist by surname among the clinic's dentists, alongside director Yoshihisa Tajima, an orthodontics-department dentist named by a different surname, and two further dentists named by surname only. Surname-only match (the given name is not printed on this roster listing, only in the collapsed/unexpanded bio sections captured); no other dentist with the same surname appears elsewhere on the site, and the clinic has only one other dentist besides director Yoshihisa Tajima with that surname in any source. | 2026-09-10 |
| sakura-platinum-dental-clinic-shibuya-tokyo-presence | https://haisha-yoyaku.jp/bun2sdental/detail/index/id/z200001757/ | EPARK Dental page for Sakura Platinum Dental Clinic, 2-22-13 Shibuya, Shibuya-ku, Tokyo, phone 03-6452-6588 — the card's address and phone; online booking: 167 reviews from patients who booked through EPARK, average 4.4, newest posted August 2026 (read 2026-10-02) | 2026-10-02 |
| sakura-platinum-dental-clinic-shibuya-tokyo-presence-2 | https://www.facebook.com/platinumsakura/ | Facebook page "Sakura Platinum Dental Clinic Shibuya" (13 followers, Cosmetic dentist), read 2026-10-02; newest post 2026-04-20; Not yet rated (0 reviews); address 2-22-13 Shibuya, Miami Building 5F-6F, Shibuya-ku, Tokyo (given in Japanese); phone +81 3-6452-6588; website sakurashika24-3.com, the clinic's own site | 2026-10-02 |
| sakura-platinum-dental-clinic-shibuya-tokyo-tripadvisor | https://www.tripadvisor.com/TypeAheadJson?action=API&details=true&q… | TripAdvisor's own search, read 2026-10-05: 12 suggestions for "Sakura Platinum Dental Clinic Shibuya" (5 attractions, 6 hotels, 1 restaurant), none of them a dental practice in or near Tokyo; 12 suggestions for "Sakura Platinum Dental" (1 place, 4 attractions, 6 hotels, 1 restaurant), none of them a dental practice in or near Tokyo; no listing for this clinic | 2026-10-05 |
| sakura-platinum-dental-clinic-shibuya-tokyo-tripadvisor-2 | https://www.sakurashika24-3.com/en/ | Clinic's website, the page at this address read 2026-10-05: no link to a TripAdvisor page | 2026-10-05 |
Change History
| Date | Change |
|---|---|
| 2026-10-05 | TripAdvisor presence checked on 2026-10-05: no listing found for this clinic. |
| 2026-10-02 | Facebook presence re-checked on 2026-10-02: live Facebook page confirmed. |
| 2026-10-02 | Presence re-checked: presence on other review platforms — yes. |
| 2026-09-10 | Name-verification pass 2026-09-10: the managing dentist of record confirmed (surname-only) via the clinic's own Japanese dentist/staff roster page, not previously fetched (background read only reached the English-language sakuradentist.com subpages). |
| 2026-09-06 | Checked by hand in a browser: 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 checks 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 Iryo Joho Net open data (snapshot 2025-12-01, facility ID 1333133100114); the two clinic domains confirmed to be the same practice (sakurashika24-3.com/en canonicalises to sakuradentist.com/en); the whole English fee list re-read; the director searched in the dentist register and found; structured data reclassified; confirmed the site publishes neither implant services nor implant fees. |
| 2026-09-04 | Initial data collection for the Japan Dental Transparency & Trust Index: verified against the clinic's own English site and fee list, the Kanto-Shinetsu Regional Bureau of Health and Welfare health-insurance designation list, the MHLW Iryo Joho Net facility register and the MHLW dentist qualification search. |
A question or a correction?
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