# 山口 偉大（Takehiro Yamaguchi） (@yamaguchi_take) on x

- id: koinon:creator:x_yamaguchi_take
- url: https://koinonlink.com/kol/x/yamaguchi_take
- schema_version: 1.4

## Identity
- platform: x
- handle: yamaguchi_take
- platform_url: https://twitter.com/yamaguchi_take
- website: http://instagram.com/yamaguchi_take
- entity_type: creator
- person_id: Cross-platform identity not resolved for this creator.

## Reach
- followers: 10843
- following: 122
- posts_total: 18359
- posts_observed: 1
- posts_per_day: 3.045
- account_age_days: 6029
- verified: true
- size_tier: koc

## Engagement
- status: peak_post_only
- peak_post_engagement_rate: 0.00028
- best_post_interactions: 3
- measurement_source: x_post_interactions
- measurement_formula: interactions on one post — likes, or likes + reposts + replies depending on the discovery path (the two are not distinguishable in the stored data)
- comparable_pool: peak_interactions
- status_note: We have only the single best observed post, so no mean exists. peak_post_engagement_rate is an UPPER BOUND, systematically higher than an average — never compare it against an average rate.
- unit_note: engagement_rate and peak_post_engagement_rate are ratios (0-1); avg_interactions_per_post and best_post_interactions are absolute counts. Read status before reading any number: a null rate has several different causes and status says which one applies here.

## Content
- category: software
- subcategory: martech
- category_confidence: 0.95
- category_source: derived_from_recent_content
- topics: AI-powered marketing operations, Open-source marketing tools, SaaS productization for growth, Marketing process design, Growth architecture, Practical AI implementation
- bio: 🔗Official Website https://t.co/fF3KRu2LnB |
Founder, Start-X https://t.co/YuI8sfVaRF | Growth Architect, Editor | 
📚著者「事業成長は、すべて設計と編集である。」

## Audience (inferred)
- status: present
- description: Growth-focused founders and marketing leaders building scalable systems, primarily tech-savvy startups and early-stage companies
- roles: ads
- seniority: decision_maker
- pain_points: Struggling to structure decision-making processes for marketing at scale, Finding it hard to justify high-cost SaaS tools without clear ROI, Lacking accessible, practical tools to implement AI-driven marketing strategies, Need to balance self-built solutions with off-the-shelf AI tools without overengineering
- posts_analysed: 5
- confidence: 0.4

## Commercial (inferred)
- audience_buyer_fit: 0.9
- promotion_intent: 0.9
- open_to_collaboration: false
- contact: Koinon does not publish creator contact details.

## Quality signals
- authenticity_score: 66
- authenticity_basis: engagement_observed
- credibility_score: 81
- flagged_for_review: false
- koinon_bd_grade: A — measures Koinon partner-outreach fit, not creator quality
- interpretation: Signals for triage, not verdicts. A flag means the profile is worth a manual check.

## Evidence
- [x_yamaguchi_take#71b92f16] 自社で意思決定を構造化する、AI CMO搭載のSaaS「Marketing-OS」というのを作ってすでに導入社数も増え始めているのですが... (https://twitter.com/yamaguchi_take/status/2072914620592124042)
- [x_yamaguchi_take#a533c013] ・SEO
- [x_yamaguchi_take#85e0b59b] ・広告
- [x_yamaguchi_take#ee650d81] ・SNS
- [x_yamaguchi_take#4e26b728] というWebマーケのメインチャネルに関しては、オープンソースでみんながすぐ手元で実務支援ツールとして使えるように日々コード書いているので無理に「自社開発」したり「他社の高いツール」は導入する必要はないよ。
- [x_yamaguchi_take#73d73ce9] 既存のClaude/GPT/Geminiあたりのツールでそれまではうまく乗り切ってもらって、実務で数値改善に有効なことが検証されたら大々的にお知らせするからさ、、、もう少し待っててよ。施策単位のツールは全て僕がオープンソースで公開していくよ。
- [x_yamaguchi_take#05b6ef1a] マーケティングの民主化みたいにさ。
- [x_yamaguchi_take#23f540a2] 一番難しい領域だけ、自分がプロダクトで実装していくよ。

## Provenance
Every inferred field below carries how it was produced. Facts stay facts; inferences stay inferences.

- audience.description: source_type=ai_inferred, confidence=0.4, freshness_days=20, method=llm_persona_from_recent_content
- audience.roles: source_type=ai_inferred, confidence=0.4, freshness_days=20, method=llm_persona_from_recent_content
- audience.seniority: source_type=ai_inferred, confidence=0.4, freshness_days=20, method=llm_persona_from_recent_content
- commercial.audience_buyer_fit: source_type=ai_inferred, confidence=0.6, freshness_days=79, method=llm_scorer — Relative signal within Koinon indexing, not a market-wide score.
- commercial.promotion_intent: source_type=ai_inferred, confidence=0.6, freshness_days=79, method=llm_scorer
- quality.anomaly_flags: source_type=heuristic, confidence=0.5, freshness_days=111, method=profile_snapshot_and_engagement_ratio_heuristic — Means "worth a manual check", NOT confirmed fraud. Flags can be wrong and are not a verdict about the person.
- quality.authenticity_score: source_type=heuristic, confidence=0.5, freshness_days=79, method=Profile-shape heuristic from a single snapshot (follower count, following ratio, account age, posting volume, verification), reduced for engagement red flags where post engagement was collected. Where only a follower count is available the score saturates at 58. — The input set differs by platform; do not compare this score across platforms.
- quality.koinon_bd_grade: source_type=ai_inferred, confidence=0.5, freshness_days=111, method=llm_partner_fit_classifier + fit_score >= 0.6 AND authenticity >= 60 => A; fit_score >= 0.4 AND authenticity >= 45 => B; else C. authenticity < 30 or a promotional-pattern flag => quarantine. — Koinon partner-outreach fit, not creator quality.
- reach.followers: source_type=observed, confidence=0.95, freshness_days=111, method=platform_profile

## Freshness
- profile_checked_days_ago: 111
- content_analysed_days_ago: 79
- audience_updated_days_ago: 20

## AI retrieval
- indexing_requests: 8
- user_triggered_requests: 0
- note: Being indexed in bulk is not the same as being retrieved to answer a question.

## This profile
- Claim or correct: https://koinonlink.com/claim?k=x_yamaguchi_take
- Request removal: https://koinonlink.com/claim?k=x_yamaguchi_take
- Terms: https://koinonlink.com/for-ai