Osaka and Tokyo SEO consultancy with in-house SEARCH WRITE tool and clinic SEO team
About PLAN-B
PLAN-B Inc. is a digital marketing company with twin head offices: one in Yotsubashi Grand Square, Shinmachi, Nishi-ku, Osaka, and one in Higashi-Gotanda, Shinagawa-ku, Tokyo. It was formed on 22 October 2003 as a limited company, launched its SEO business in March 2007 and became a joint-stock company in May that year. Capital stands at 100 million yen. Masanori Toriimoto is representative director. The group had 265 staff in December 2025. In 2023 it formed PLAN-B Marketing Partners as a joint venture with ADK Holdings, and in 2024 it set up a development subsidiary in Vietnam.
The company works across digital marketing, marketing DX and social commerce. Within SEO it offers consulting, article production, owned media operation, conversion rate work, an LLMO survey on generative AI visibility, and its own SEO software, SEARCH WRITE, which lets clients move work in-house over time. Its consulting process begins with a web hearing, then research in Google Analytics, Search Console and other tools, a proposal, contract, and execution with monthly review meetings.
PLAN-B runs a dedicated hospital and clinic SEO offer. Its consultant Ryuta Kitamura, a manager who has handled YMYL sites including clinics and hospitals, has written that medical sites need cited sources, visible doctor supervision, plain-language explanations and careful wording under Japan's medical advertising guidelines. He presented a free webinar on clinic SEO strategy in June 2024 covering keyword strategy and on-page, off-page and technical tactics.
The firm has published a dental example. An unnamed dental clinic was stuck at 15th for an area plus dentist search. PLAN-B pruned low-value diary posts, reworked the top page, added internal links and wrote articles for people not yet seeking treatment. After 18 months organic conversions reached 136 percent and sessions 174 percent of the starting level, the dentist keyword rose to 2nd, and an implant keyword moved from 3rd to 1st. A separate case covers a site rebuild and ongoing SEO for Shinkokai, a medical corporation running health checkup clinics.
Pricing is published and sits at the upper end of the market. The standard SEO plan starts at 500,000 yen a month and the premium plan at 700,000 yen, both with a six-month minimum. A one-month strategy design project costs 1,500,000 yen, and content writing starts at 80,000 yen per article. PLAN-B does not accept new performance-based contracts. Its retention rate is about 95 percent, and 87 percent of clients have a monthly fee ceiling of 200,000 yen or more.
The profile fits dental groups, multi-site practices and implant or specialist clinics with meaningful budgets and competitive local markets. Single-chair practices may find the minimums high.
PLAN-B's Website
PLAN-B at a Glance
| Founded | 2003 |
|---|---|
| Team size | 265 employees including group companies (December 2025) |
| Headquarters | Nishi-ku, Osaka, Osaka Prefecture, Japan |
| Other offices | Tokyo (Higashi-Gotanda, Shinagawa-ku); Vietnam (PLAN-B TECHNOLOGIES VIETNAM) |
| Leadership | Masanori Toriimoto (Representative Director and CEO); Hirokazu Shiomoto (Director and CFO); Shinsuke Azuma (Director) |
| Languages | Japanese |
| Pricing | SEO consulting standard plan from 500,000 yen per month and premium from 700,000 yen per month (both pre-tax, 6-month minimum); strategy design plan 1,500,000 yen for one month; content writing from 80,000 yen per article. No new performance-based contracts. |
| Contracts & reporting | Six-month minimum on monthly plans; monthly review meetings plus phone and email updates; contracts signed on paper or via Cloudsign; retention rate around 95 percent. |
| Tools & partnerships | SEARCH WRITE (in-house SEO tool); Google Analytics; Google Search Console; Cloudsign |
Dental Marketing Services
- Clinic and hospital SEO consulting
- keyword strategy for area plus treatment searches
- content audit and pruning
- top page and UI/UX redesign
- internal linking
- SEO article production with medical guideline review
- local SEO and MEO advice
- LLMO generative AI visibility survey
- listing and social ad management
- website production
Practice Types They Work With
- general dentistry
- implants
- hospitals and clinics
- health checkup clinics
Dental Clients & Results
- Unnamed dental clinic: organic conversions to 136 percent and sessions to 174 percent, area plus dentist keyword from 15th to 2nd, area plus implant keyword from 3rd to 1st (18 months)
- Shinko Medical Support / Shinkokai: group site rebuild with SEO consulting from October 2024, conversion rate rose after renewal (no figure published)
Why Dentists Choose PLAN-B
- Osaka head office in Yotsubashi Grand Square, Nishi-ku
- About 265 group staff as of December 2025
- Runs its own SEO platform, SEARCH WRITE
- Offers an SEO strategy and execution plan through SEARCH WRITE
- Over 20 years in business since its 2003 founding
Key Strengths
- Sets SEO goals around attracting patients, not rankings alone
- Assigns industry-specific consulting teams, such as for medical and clinic sites
- Drafts SEO-designed article outlines matched to treatments and target patients
How the DSA Score Breaks Down
Points earned: 23.2 of 100 (profile 29 × 0.8 + client feedback 0). DSA Score: 85/100
Where PLAN-B Is Listed
Questions Dentists Ask About PLAN-B
Has PLAN-B improved rankings for a dental clinic?
Yes. In a published case, a dental clinic moved from 15th to 2nd for an area plus dentist search and from 3rd to 1st for an implant term over 18 months. Organic conversions rose to 136 percent of the baseline.
How much does PLAN-B SEO consulting cost?
Published plans start at 500,000 yen a month for standard and 700,000 yen for premium, before tax, with a six-month minimum. A one-off strategy project costs 1,500,000 yen.
Does PLAN-B understand Japan's medical advertising rules?
Its clinic SEO content stresses keeping wording within the medical advertising guidelines, citing sources and showing supervising doctors, and its clinic consultant specialises in YMYL sites.
Can we bring SEO in-house later?
PLAN-B offers its SEARCH WRITE tool, and some clients have moved from consulting to running SEO themselves with it.
Do they offer pay-for-results SEO?
No. PLAN-B does not accept new performance-based contracts.
Reviews of PLAN-B
No reviews on this site yet. Have you worked with PLAN-B? Your review helps other dentists choose.