# 基島隆蔵 (@ryuzo_jp) on x

- id: koinon:creator:x_ryuzo_jp
- url: https://koinonlink.com/kol/x/ryuzo_jp
- schema_version: 1.4

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

## Reach
- followers: 4192
- following: 1406
- posts_total: 4622
- posts_observed: 6
- posts_per_day: 2.923
- account_age_days: 1581
- verified: true
- size_tier: nano

## Engagement
- status: peak_post_only
- peak_post_engagement_rate: 0.11999
- best_post_interactions: 503
- 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: ai_tools
- category_confidence: 0.85
- category_source: derived_from_recent_content
- topics: LLM usage and limitations, AI model deployment (e.g., DeepSeek, Codex), AI infrastructure and data center economics, Tech news curation and information quality

## Audience (inferred)
- status: present
- description: Tech enthusiasts and AI practitioners in Japan, primarily interested in LLMs, AI infrastructure, and tech news curation
- roles: automation
- seniority: practitioner
- pain_points: Struggling with limited access to high-performance AI models due to credit or availability constraints, Frustrated by lack of timely system resets or infrastructure updates, Overwhelmed by information manipulation in AI-related content, Difficulty in finding reliable, high-quality tech news sources
- posts_analysed: 7
- confidence: 0.4

## Commercial (inferred)
- audience_buyer_fit: 0.9
- promotion_intent: 0.8
- open_to_collaboration: false
- contact: Koinon does not publish creator contact details.

## Quality signals
- authenticity_score: 73
- authenticity_basis: engagement_observed
- credibility_score: 73
- 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_ryuzo_jp#bb932168] 久々にちょっと中華系llmの小手業のツイート見てたら、情報操作されてる気分になった (https://twitter.com/ryuzo_jp)
- [x_ryuzo_jp#74870584] 1: codex creditを買う 2: deepseek v4 flashをぶちこむ
- [x_ryuzo_jp#9c29cee9] 明日朝までに、頼んだぞ
- [x_ryuzo_jp#3358daeb] そろそろreset来ないと困る
- [x_ryuzo_jp#471d0ec0] うおおお！！！
- [x_ryuzo_jp#0ec81fb1] farzaが日本にいる！ https://t.co/XZEhQVXZ8g
- [x_ryuzo_jp#59b74301] ラウドン郡のデータセンターはオフィスよりはるかに高い面積当たり評価額を持ち、商業用不動産の評価額と税収の中心を担っている。 住宅所有者向け不動産税率が過去10年にわたり引き下げられてきた理由が、データセンターだ https://t.co/s0R1admsy2
- [x_ryuzo_jp#c2949d7a] いい感じのニュースサイトを作っています

## 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=77, 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=77, method=llm_scorer
- quality.anomaly_flags: source_type=heuristic, confidence=0.5, freshness_days=121, 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=77, 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=121, 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=121, method=platform_profile

## Freshness
- profile_checked_days_ago: 121
- content_analysed_days_ago: 77
- audience_updated_days_ago: 20

## AI retrieval
- indexing_requests: 6
- 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_ryuzo_jp
- Request removal: https://koinonlink.com/claim?k=x_ryuzo_jp
- Terms: https://koinonlink.com/for-ai