Shizuoka digital marketing firm with Google Partner status and AI search plans
About Shinker
Shinker Co., Ltd. (Kabushiki Kaisha Shinker) is a digital marketing company headquartered in Gofukucho, Aoi-ku, Shizuoka City. It also has offices in Fujieda, in the Zaza City building in Hamamatsu, in Shibuya in Tokyo and in Kofu in Yamanashi. The company was registered on 3 October 2022 with capital of 9.99 million yen, and its mission is to help regional Japan develop through digital marketing.
Hikaru Soneda founded the firm and serves as representative director and CEO. The company has 21 staff including part-timers and interns, though the member page shows 29 people, with an average age of 26. Many of them are SNS directors, video creators and designers. They marked a fifth anniversary with an event called SHIN-WAVE, which suggests the founder's business predates the 2022 registration.
Their search work covers SEO, MEO for Google Maps listings, and AI search optimization under the labels AIO, GEO and LLMO. The AI search plan follows five steps: a free diagnosis, analysis of the current site, a proposal with an estimate, the contract, and ongoing improvement. Monthly fees are 100,000 yen for START (site and competitor analysis, keyword design, one article, reports), 200,000 yen for STANDARD (adds backlink work and two articles) and 450,000 yen for PREMIUM (adds internal structure work, a fixed page and four articles). The minimum term is six months. In September 2026 they released AIRA Score, a tool that rates how likely a site is to be cited by AI search.
Beyond search, they run listing, Meta, TikTok, YouTube and ChatGPT ads, manage Instagram, TikTok, YouTube and LINE accounts, and produce websites, landing pages, recruitment sites and print design. Other services include an influencer PR service, inbound tourism marketing and analytics setup with Google Tag Manager and GA4.
They have Google Partner status along with Meta, LINE and Yahoo partner badges, and more than 210 clients. Named clients include Shizuoka Bank, Shizuoka Gas, Shizuoka Shimbun, Shizuoka University, Shizutetsu Taxi and Tokai Jidosha, and the cities of Shizuoka, Fujieda and Hamamatsu are also clients. In October 2026 they were selected for the Best Venture WEST100 list. They sponsor the VELTEX Shizuoka basketball club and the T.League table tennis team JADE, and they run their own local food and travel channels.
No dental clinic appears among their published clients or services. For dentists in Shizuoka Prefecture, Shinker suits practices that want a single team for ads, social video and AI-era search, and that can commit to a six-month minimum and a monthly budget starting at 100,000 yen for the AI search plans.
Shinker's Website
Shinker at a Glance
| Founded | 2022 |
|---|---|
| Team size | 21 staff including part-timers and interns (29 people on the member page) |
| Headquarters | Shizuoka (Aoi-ku, Gofukucho), Shizuoka Prefecture, Japan |
| Other offices | Fujieda, Hamamatsu, Tokyo (Shibuya), Kofu |
| Leadership | Hikaru Soneda (Representative Director, President and CEO) |
| Languages | Japanese |
| Pricing | AI search optimization plans: START 100,000 yen per month; STANDARD 200,000 yen per month; PREMIUM 450,000 yen per month. Extra pages from 40,000 yen each; photography from 70,000 yen per day; maintenance from 5,000 yen per month. |
| Contracts & reporting | Minimum contract of 6 months for AI search plans. Process: free diagnosis, current-state analysis, proposal and estimate, contract, ongoing improvement. Reports included in plans. |
| Tools & partnerships | Google Partner; Meta Business Partner; LINE and Yahoo partner badges; GA4; Google Tag Manager; Google Search Console; WordPress; AIRA Score (in-house AI search scoring tool) |
Dental Marketing Services
- SEO
- MEO (Google Maps listing optimization)
- AI search optimization (AIO, GEO, LLMO)
- listing ads
- Meta, TikTok, YouTube and ChatGPT ads
- Instagram, TikTok and LINE account management
- website and landing page production
- recruitment site production
- GA4 and Google Tag Manager setup
Why Dentists Choose Shinker
- Lists Shizuoka Bank and Shizuoka Gas as clients
- Google Partner certification announced on its site
- Hosts Instagram strategy meetups in Shizuoka
- Offers AI search (AIO/LLMO) optimization
- Office network from Fujieda to Hamamatsu
Key Strengths
- Implements JSON-LD structured data so practice sites show in search and AI answers
- Builds pages from the practice's own photos and cases, not stock images
- Designs smartphone layouts with easy-tap buttons and simpler booking forms
- Supports Google Tag Manager setup and recruitment consulting for practices hiring staff
Awards & Recognition
- Best Venture WEST100, 2026 edition (October 2026)
How the DSA Score Breaks Down
Points earned: 20.8 of 100 (profile 26 × 0.8 + client feedback 0). DSA Score: 84/100
Where Shinker Is Listed
Questions Dentists Ask About Shinker
Does Shinker work with dental clinics?
Their published client list features banks, utilities, media, universities and local governments in Shizuoka. No dental clinic is named.
Are they a Google Partner?
Yes. They have Google Partner status and certified staff on the team. They also hold Meta, LINE and Yahoo partner badges.
What does their AI search optimization cost?
Monthly plans are 100,000 yen (START), 200,000 yen (STANDARD) and 450,000 yen (PREMIUM). Each requires a minimum six-month contract.
Where are their offices?
Headquarters is in Gofukucho, Aoi-ku, Shizuoka City, with further offices in Fujieda, Hamamatsu, Shibuya in Tokyo and Kofu in Yamanashi.
Can they also handle social media and video?
Yes. They manage Instagram, TikTok, YouTube and LINE accounts and have several in-house video creators and SNS directors.
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