by Wellbound Co., Ltd.A dedicated account team for your online marketplace business in Japan
Sales Doctor is the marketplace management service of Wellbound Co., Ltd., a Japanese company founded in 1973. From our Tokyo office, we manage product listings, advertising, promotions and performance analysis for brands that sell on major online marketplaces in Japan, so that each client can grow sales while protecting profit.
Who we work with
Our clients are manufacturers and brand owners that sell their own products online and want a reliable partner for day-to-day marketplace operations.
Japanese brands and manufacturers
Companies that sell their own products online but do not have enough in-house staff or know-how to run their seller account every day. We have worked with companies ranging from listed corporations to small businesses.
Overseas brands entering Japan
Brands outside Japan that want to start or expand sales in the Japanese market and need a local team that understands Japanese customers, search behavior and product page expectations.
Teams that want to build skills in-house
Companies that prefer to operate their account themselves and want an experienced advisor for strategy, analysis and training.
Our services
We offer three core services. Each client is assigned a dedicated account manager who is responsible for the plan, the work and the monthly review.
1. Account Management
We operate the client's seller account on their behalf, as an extension of their team. Typical scope:
- Product listing creation and optimization: titles, bullet points, descriptions, search keywords, attributes and images
- Catalog maintenance: variations, categories, product information corrections
- Enhanced brand content, brand store pages and image plans (production available as an option)
- Pricing, coupons, promotions and sale event planning and setup
- Inventory planning and creating shipment plans to the fulfillment network
- Advertising campaign design and optimization (included)
- Account health monitoring and support case handling
- Sales, traffic and conversion analysis with a monthly report and a monthly meeting
- Chat and email support on business days; customer message handling as an option
Minimum contract: 6 months. For sellers (not vendors).
2. Advertising Management
We plan, build and optimize sponsored advertising campaigns to grow sales while keeping advertising cost at a sustainable level.
- Account audit and campaign structure design (portfolios, campaigns, ad groups)
- Keyword and product targeting research based on search term data
- Weekly bid adjustments and negative keyword management
- Budget pacing, including plans for major sale events
- Monthly advertising report: spend, sales, ACoS / TACoS, findings and next actions
Standard plan: sponsored product ads. Premium plan: sponsored product, brand and display ads. Minimum contract: 3 months.
3. Consulting
For companies that run their account in-house and want an experienced advisor.
- Current-state analysis: market, competitors and own account
- Strategy and action plan with clear priorities
- Regular online meetings and chat/email questions
- Training to build in-house operating skills
New consulting contracts are currently limited because the team is fully booked. Please contact us for availability.
AI Enablement Training for Advertising Teams
A 10-hour hands-on program for in-house teams. Participants learn to connect their own advertising data to AI assistants, analyze performance and adjust campaigns with human review at every step.
Price: 220,000 JPY per participant (tax included).
Store Operations for Local Governments
As a registered intermediary operator for the marketplace's hometown tax donation program (Furusato Nozei), we operate the online stores of Japanese municipalities on their behalf.
- Registration and page optimization of return gifts
- Advertising and fulfillment support
- Daily reconciliation of orders and donations
- Donor inquiries and coordination with local suppliers
- Monthly reports to each municipality
Donor information is handled under our ISO/IEC 27001 controls. Pricing is quoted individually for each municipality.
How we use the account access our clients grant us
To deliver Account Management and Advertising Management, our account managers need access to the client's Seller Central account. Clients grant this access themselves through the account's user permissions, and we only request the permissions required for the agreed scope of work:
- Catalog and listings: create and edit product listings, images, variations and product information
- Pricing and promotions: set prices, coupons, promotions and deals
- Inventory and fulfillment: view inventory and create shipment plans
- Advertising: create and manage campaigns, budgets, bids and targeting
- Orders and buyer messages: monitor orders and cancellations, reconcile orders and donations for municipalities, and reply to buyer messages when this is part of the agreed scope
- Reports and analytics: business reports, advertising reports and brand analytics for performance analysis
- Account health and support: monitor performance notifications and open support cases on the client's behalf
We do not change bank, payment, tax or login settings. When a contract ends, we ask the client to remove our user permissions and we delete copies of client data in line with our Privacy Policy.
How we work
Operations can usually start about one month after the first inquiry.
- Inquiry and free diagnosis
A 30-minute online meeting to understand the current situation and goals. No obligation. - Account analysis
Market, competitor and account analysis to identify the root causes of the current results. - Proposal
A plan with priorities, scope of work and pricing based on the analysis. - Kickoff and execution
The dedicated account manager sets up access, aligns on goals and starts the work. - Monthly review
Monthly report and meeting to review results and agree on the next actions.
Our expertise and credentials
Data-driven diagnosis
Every engagement starts with analysis of search terms, competitor product pages, customer reviews and the client's own sales and advertising data. Recommendations are tied to numbers, not guesswork.
Dedicated account managers
Each client has a named account manager and can reach the team by chat, email, phone or online meeting. Our managers have experience in food, cosmetics, supplements, household goods, interior goods, stationery, outdoor and hobby categories.
Information security
Wellbound Co., Ltd. operates an information security management system certified to ISO/IEC 27001:2022 (JIS Q 27001:2023). Client data is handled under documented access control, retention and incident response procedures.
Client results
Selected results from clients who agreed to be featured. Figures are measured on each client's own sales and advertising data. Results depend on the product, market and conditions, and are not a guarantee of similar outcomes.
Granje Co., Ltd.
- Products
- About 30
- Challenge
- Not enough in-house resources to run the account
- Actions
- Brand registration, brand store, enhanced content, improved images
- Outcome
- Conversion rate +6.8 points in two months
Osaka Meiban Co., Ltd.
- Products
- About 50
- Challenge
- Featured offer won only about 30% of the time because of other resellers
- Actions
- Featured offer measures, product page improvements, review program, advertising optimization
- Outcome
- Featured offer rate above 90% within three months; sales grew about 30% per month on average
Wada Calcium Pharmaceutical Co., Ltd.
- Products
- About 20
- Challenge
- First time selling online on a marketplace
- Actions
- Awareness campaigns, brand store, main and sub image improvements
- Outcome
- A product for younger customers became the hero product that drives cross-selling
StayFree Co., Ltd.
- Products
- 500+
- Challenge
- Many unauthorized resellers on the same listings
- Actions
- Featured offer measures, promotion improvements, advertising optimization
- Outcome
- Featured offer rate improved by about 14 points
B.N Co., Ltd.
- Products
- About 40
- Challenge
- Sales had reached a plateau
- Actions
- Market and competitor research, new sub images, search-term-based advertising optimization
- Outcome
- About 1.7x in the first year and about 1.4x in the second year
Sunny Day Market Co., Ltd.
- Products
- About 80
- Challenge
- No resources to manage advertising
- Actions
- Search term analysis, brand ads, balanced manual and automatic campaigns
- Outcome
- 200% in month 11 while keeping TACoS around 10%
What our clients say
The comments below are the personal opinions of each client.
"We used to work with another agency, but responses were slow and our contact person changed often. At Sales Doctor, a dedicated manager listens to us carefully, so we can leave the work to them with confidence."
"They are not just doing tasks for us. They understand our brand deeply and aim to grow together with us. Their proposals in our regular meetings are on point, and they feel like members of our own team."
"They handle the fine adjustments that automated tools cannot, and respond flexibly to changes in the market. Operation based on human judgment and experience is producing steady results."
"Even before the contract, they gave us a very detailed market and competitor analysis and proposal. In actual operations, too, the results have exceeded our expectations."
Pricing
Prices below apply to new contracts starting on or after January 1, 2027. All prices are in Japanese yen and exclude consumption tax unless noted. Advertising spend is paid by the client directly and is not included in our fees. We provide a written quote based on this price list before any contract. For contracts starting before January 1, 2027, please contact us for a quote under our current terms.
Account Management – Performance Mix
A fixed monthly fee plus a percentage of sales. The tier is set by the client's average monthly sales, and the percentage goes down as sales grow. One contract covers one seller account.
| Average monthly sales | Fixed monthly fee | Performance fee | Notes |
|---|---|---|---|
| Under 500,000 | 100,000 | 7% of sales | Up to 5 SKUs |
| 500,000 to under 3,000,000 | 120,000 | 5% of sales | – |
| 3,000,000 to under 10,000,000 | 150,000 | 4% of sales | Monthly total capped at 500,000 |
| 10,000,000 or more | 500,000 | None (fixed monthly fee) | – |
- Setup fee: 100,000 (account diagnosis, operating plan, review of existing listings and initial advertising setup). Minimum term: 6 months.
- Sales means tax-inclusive sales of the managed products, net of returns. The tier is set at the start of each contract term from past average monthly sales and does not change during the term.
- The monthly fee includes advertising management and the monthly report. No separate percentage of ad spend is charged.
- Example: for a client in the second tier with 2,800,000 in sales in a month, the fee is 120,000 + 140,000 = 260,000.
- Clients with monthly sales under 10,000,000 who prefer a fixed monthly fee receive an individual quote. Account Management is for sellers; vendors can use Advertising Management or Consulting.
Other services
| Service / plan | Setup fee | Monthly fee | Minimum term |
|---|---|---|---|
| Advertising Management – Standard Sponsored product ads. Weekly bid and negative keyword management. | 50,000 | 10% of ad spend (minimum 50,000, maximum 500,000) | 3 months |
| Advertising Management – Premium Sponsored product, brand and display ads. | 50,000 | 15% of ad spend (minimum 70,000, maximum 500,000) | 3 months |
| Consulting – Premium Monthly online meeting (60 minutes) and chat support. Currently limited availability. | from 100,000 | from 180,000 | 6 months |
| AI Enablement Training 10 hours, per participant. | – | 220,000 per participant (tax included, one-time) | – |
Optional work is quoted separately, for example new product registration (5,000 per SKU), sub image production (7,000 to 10,000 per image) and enhanced content production (from 10,000 per content page). Prices may be revised; the current price list is always shown on this page.
Data protection and security
Our clients trust us with access to their seller accounts and business data. We protect that trust with the following controls.
Certified management system
Our information security management system is certified to ISO/IEC 27001:2022 (JIS Q 27001:2023). It includes a documented risk assessment process that is reviewed at least once a year and whenever our services or systems change.
Least-privilege access
Each account manager receives only the permissions needed for their assigned clients. We use individual user accounts with multi-factor authentication, never shared logins, and we disable and remove access within 24 hours when a staff member leaves or changes role.
Minimal handling of personal data
We access end customers' personal information only when a client-requested task requires it, such as order checks, buyer messages or donor inquiries for municipalities. We view it only inside Seller Central or the municipality's own system, and we do not download, copy or store it in our own systems.
Incident response
We maintain an incident response plan covering monitoring, detection, containment, recovery and notification. If a security incident affects client or marketplace data, we notify the affected client without undue delay and notify the marketplace operator within the timeframe required by its data protection policy (for Amazon, security@amazon.com within 24 hours of detection).
Organizational changes
We notify the marketplace operator within 30 days of any organizational change that affects our need for, or use of, the data we access on behalf of our clients.
Staff confidentiality and training
All staff sign confidentiality agreements and receive information security training when they join and at least once a year.
Company profile
- Company name
- Wellbound Co., Ltd. (株式会社ウェルボン)
- Service name
- Sales Doctor
- Established
- April 1973
- Capital
- 30,000,000 JPY
- Head office
- 2-69-7 Kyoden, Sakata, Yamagata 998-0102, Japan
- Tokyo office
- InSquare Ueno, 2-12-18 Ueno, Taito-ku, Tokyo 110-0005, Japan (opened in 2010)
- Business
- E-commerce marketplace management and advertising services; hometown tax donation program support for local governments; printing and bookbinding; book repair
- Certification
- ISO/IEC 27001:2022 / JIS Q 27001:2023
- Corporate website
- https://wellbound.co.jp/
Contact
For a free 30-minute diagnosis or any question about our services, please contact our Tokyo office. We reply within two business days.
Phone
+81-3-4405-9440
Weekdays 9:00–17:30 (Japan time)
Address
Wellbound Co., Ltd. Tokyo Office
InSquare Ueno, 2-12-18 Ueno, Taito-ku, Tokyo 110-0005, Japan
Privacy Policy
Established: November 2026 / Last updated: November 2026
Wellbound Co., Ltd. ("we", "us") provides the Sales Doctor services and operates this website. This policy explains how we collect, use, store, protect, share and delete information, in accordance with the Act on the Protection of Personal Information of Japan and the data protection requirements of the marketplaces where our clients sell.
1. Information we collect
- Inquiry and contract information: name, company name, job title, email address, phone number and the content of your messages.
- Client business information: product information, sales targets, contracts and other information our clients provide to us.
- Seller account data accessed on behalf of clients: catalog, pricing, inventory, sales, traffic and advertising performance data that our clients authorize us to access through their seller account user permissions or authorized tools. End customers' personal information (such as names and addresses) is accessed only when a client-requested task strictly requires it.
- Website usage data: access logs and cookies used to understand how this website is used.
2. How we use information
- To provide, manage and improve the services our clients have contracted.
- To prepare reports and proposals for the client that owns the data.
- To respond to inquiries and to send information about our services, seminars and events (you can opt out at any time).
- To comply with laws and regulations.
We use seller account data only to provide services to the client that owns it. We do not sell it, use it for our own marketing, or use it to benefit other clients.
3. How we store information
Information is stored in access-controlled business systems and cloud services operated by reputable providers. Data is encrypted in transit and, where supported, at rest. We do not store client account credentials.
4. How we protect information
We operate an information security management system certified to ISO/IEC 27001:2022. Controls include least-privilege access, individual accounts with multi-factor authentication, access reviews, staff confidentiality agreements and training, and a documented incident response plan.
5. Sharing with third parties
We do not provide personal information or client data to third parties without consent, except where required by law. When we use service providers (for example, cloud services), we choose providers with appropriate security and bind them to confidentiality obligations.
6. Retention and deletion
- Inquiry information is kept for up to three years after the last contact and then deleted.
- Client data is kept for the contract period and deleted within 30 days after the contract ends, unless the client requests otherwise in writing or the law requires longer retention.
- End customers' personal information, when handled at all, is kept no longer than 30 days after order delivery and only as long as necessary for the client-requested task.
- When a contract ends, we ask the client to remove our user permissions from their seller account.
7. Security incidents
If we become aware of a security incident involving personal information or client data, we contain it, notify the affected clients without undue delay, report to the authorities as required by law, and notify the marketplace operator within the timeframe its policies require.
8. Your rights
You may request disclosure, correction, suspension of use or deletion of your personal information held by us. Please contact us using the details below. We will verify your identity and respond within a reasonable period.
9. Cookies
This website may use cookies and similar technologies to analyze traffic. You can disable cookies in your browser settings.
10. Contact for privacy matters
Wellbound Co., Ltd. Tokyo Office, InSquare Ueno, 2-12-18 Ueno, Taito-ku, Tokyo 110-0005, Japan
Email: sales@wellbound.jp / Phone: +81-3-4405-9440 (weekdays 9:00–17:30 Japan time)
11. Changes to this policy
We may update this policy. The latest version and its update date are always published on this page.
日本語のご案内
Sales Doctor（セールスドクター）は、株式会社ウェルボン（1973年創業、東京支社：東京都台東区）が提供するECモール出品者向けの運用支援サービスです。専任の担当者が、商品ページの改善、広告運用、セール・プロモーションの企画と設定、実績の分析までを支援します。
- アカウント運用代行：日々の運用業務をまとめて代行します（契約期間6か月から）
- 広告運用代行：広告に絞った運用代行です（契約期間3か月から）
- コンサルティング：自社で運用する企業の相談相手として、分析と戦略立案を支援します
- 自治体向け運用支援：ふるさと納税の中間事業者として、自治体の店舗運用を代行します
情報セキュリティマネジメントシステムの国際規格 ISO/IEC 27001:2022（JIS Q 27001:2023）の認証を取得しています。お問い合わせは sales@wellbound.jp または 03-4405-9440（平日 9:00〜17:30）までご連絡ください。