01Company & business model
BELFORTS LLC is a Japanese company operating its own owned-media and web marketing business. We build and run our own content websites — for example our corporate site at bel-forts.com — and we decide which market niches to enter based on objective demand data rather than intuition.
We are an independent Google Ads developer building an internal tool for our own company only. The tool is not a product, service, or SaaS offered to third parties.
| Legal name | BELFORTS LLC / 合同会社BELFORTS |
|---|---|
| Representative | Masaya Nakashima (中嶋 匡哉) |
| Founded | December 8, 2023 |
| Business | Generative-AI & DX consulting / Web marketing / Development and operation of owned media |
| Website | https://bel-forts.com |
02What the tool does
The tool is a small, internal, read-only research script used exclusively by our own team. It calls a single Google Ads API service to retrieve historical keyword planning metrics for a list of industry keywords in Japan, and stores the results in a CSV file for internal analysis.
- API service used:
KeywordPlanIdeaService.GenerateKeywordHistoricalMetrics— read-only. - Retrieved fields: average monthly searches, competition, competition index, and top-of-page CPC bid estimates.
- Targeting: geo = Japan (
geoTargetConstants/2392), language = Japanese (languageConstants/1005). - The data is used internally to rank markets by search demand and monetization potential, and to decide which content topics and SEO pages to build for our own websites.
03Data flow
- An industry keyword list is prepared internally from public industry classifications.
- The script calls
GenerateKeywordHistoricalMetricsin batches (read-only). - Responses are written to
raw_keyword_data.csv, stored on our own internal system. - We screen and rank the results internally by demand and estimated monetization.
- The ranking informs the content plan for websites we own and operate ourselves.
04Access & intended audience
- Audience: internal users only — our own company's team. Not a public or client-facing product.
- All API calls run on our own manager (MCC) account 238-901-0145. We do not access any third-party Google Ads account.
- Authentication uses OAuth 2.0 with our own credentials. The developer token is stored securely and is never shared or embedded in any distributed artifact.
- Call volume is modest and batched — a few hundred keywords per run, rate-limited.
05What the tool does not do
- It does not create, modify, manage, or automate advertising campaigns.
- It does not manage or access any third-party or client Google Ads account.
- It does not resell, redistribute, or expose the retrieved data to any external party.
- It is not offered as a tool, SaaS, or service to external users.
- It does not use the App Conversion Tracking and Remarketing API.
06Summary
This is a narrow, read-only, internal keyword-research tool operating on our own single manager account, used solely to inform the content strategy of websites we own. Our functioning company website is available at https://bel-forts.com, and questions about this tool can be sent to k_nakashima@bel-forts.com.