{
  "@context": "https://koinonlink.com/schema/creator/v1.4",
  "@type": "Creator",
  "schema_version": "1.4",
  "id": "koinon:creator:youtube_japan-dev",
  "url": "https://koinonlink.com/kol/youtube/japan-dev",
  "alternate": {
    "html": "https://koinonlink.com/kol/youtube/japan-dev",
    "json": "https://koinonlink.com/kol/youtube/japan-dev.json",
    "markdown": "https://koinonlink.com/kol/youtube/japan-dev.md"
  },
  "identity": {
    "display_name": "Japan Dev",
    "handle": "japan-dev",
    "platform": "youtube",
    "platform_url": "https://www.youtube.com/@japan-dev",
    "website": null,
    "country": "JP",
    "country_name": "Japan",
    "location_text": null,
    "entity_type": "creator",
    "person_id": null,
    "person_id_note": "Cross-platform identity not resolved for this creator.",
    "other_accounts": [],
    "claimed": false,
    "claimed_note": "Not claimed. This says nothing about the creator — most profiles are simply not claimed yet.",
    "declared_accounts": []
  },
  "first_party": null,
  "reach": {
    "followers": 1890,
    "following": null,
    "posts_total": null,
    "posts_observed": 1,
    "account_age_days": null,
    "posts_per_day": null,
    "verified": false,
    "size_tier": "nano"
  },
  "engagement": {
    "status": "not_collected",
    "engagement_rate": null,
    "engagement_rate_basis": null,
    "posts_in_average": null,
    "avg_views_per_post": null,
    "peak_post_engagement_rate": null,
    "avg_interactions_per_post": null,
    "best_post_interactions": null,
    "measurement_source": null,
    "measurement_formula": null,
    "comparable_pool": null,
    "status_note": "Engagement has not been collected for this creator yet. This is a gap in our collection, NOT a statement that the creator has no engagement. Follower count is known, so it is measurable.",
    "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": {
    "bio": "Japan Dev – Land Your Dream Tech Job in Japan Japan Dev is a job board showcasing jobs in Japan — mostly for ...",
    "topics": [
      "Relocating to Japan for tech jobs",
      "Japanese tech hiring process",
      "Language barriers for foreign tech workers",
      "Career transition into Japan's tech industry",
      "Visa and immigration challenges for foreign engineers",
      "Success stories of foreigners building tech careers in Japan"
    ],
    "topics_en": [
      "Relocating to Japan for tech jobs",
      "Japanese tech hiring process",
      "Language barriers for foreign tech workers",
      "Career transition into Japan's tech industry",
      "Visa and immigration challenges for foreign engineers",
      "Success stories of foreigners building tech careers in Japan"
    ],
    "topics_zh": [
      "移居日本从事科技工作",
      "日本科技行业招聘流程",
      "外国科技从业者的语言障碍",
      "转型进入日本科技行业",
      "外国工程师的签证和移民挑战",
      "外国人在日本科技行业职业发展成功案例"
    ],
    "category": "software",
    "category_label": "Software",
    "subcategory": "devtools",
    "subcategory_label": "Developer tools / infra",
    "category_confidence": 0.75,
    "category_source": "derived_from_recent_content"
  },
  "audience": {
    "status": "present",
    "status_note": null,
    "description": "International tech professionals, especially software engineers and designers, aiming to relocate to Japan for high-paying tech jobs",
    "roles": [
      "dev"
    ],
    "seniority": "practitioner",
    "pain_points": [
      "Struggling with language barriers when moving to Japan",
      "Facing difficulties in understanding Japanese company hiring processes and expectations",
      "Worrying about visa challenges and long-term career stability in Japan",
      "Feeling uncertain about whether they qualify for tech jobs in Japan without Japanese language skills"
    ],
    "posts_analysed": 19,
    "confidence": 0.6,
    "traceable": false,
    "traceable_note": "The posts this inference was computed from are NOT retained, so this conclusion cannot be traced back to its inputs. evidence[] holds separately collected profile content and is NOT the input to this inference — do not cite it as support. confidence is a number the model reported about its own reading, NOT a measure of verifiability: a high confidence with traceable=false is still an untraceable claim."
  },
  "commercial": {
    "audience_buyer_fit": 0.7,
    "promotion_intent": 0.5,
    "open_to_collaboration": false,
    "contact": null,
    "contact_note": "Koinon does not publish creator contact details."
  },
  "quality": {
    "authenticity_score": 35,
    "authenticity_basis": "profile_shape_only",
    "authenticity_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.",
    "authenticity_comparable_across_platforms": false,
    "credibility_score": 35,
    "credibility_note": null,
    "flagged_for_review": false,
    "flag_reasons": [],
    "anomaly_flags": [],
    "koinon_bd_grade": {
      "value": "C",
      "scale": [
        "A",
        "B",
        "C",
        "quarantine",
        null
      ],
      "value_meanings": {
        "A": "Strong fit for Koinon partner outreach.",
        "B": "Moderate fit.",
        "C": "Weak fit, or never scored.",
        "quarantine": "Flagged for manual review. Excluded from Koinon published statistics, but creator search still RETURNS these profiles unless you pass exclude_anomalous:true — check quality.flagged_for_review.",
        "null": "Never scored."
      },
      "measures": "koinon_partner_outreach_fit",
      "basis": "koinon_bd_fit_and_engagement",
      "formula": "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.",
      "comparable_across_platforms": false,
      "interpretation": "NOT a quality score and NOT fit for your campaign — it grades Koinon own partner-outreach interest in gaming, e-commerce and software. A \"C\" usually means \"outside those industries\" or \"not yet scored\".",
      "explained_at": "https://koinonlink.com/for-ai#koinon_bd_grade"
    },
    "interpretation": "Signals for triage, not verdicts. A flag means the profile is worth a manual check."
  },
  "evidence": [
    {
      "evidence_id": "youtube_japan-dev#304078e6",
      "type": "creator_content",
      "excerpt": "House Hunting in Japan: Language Barrier",
      "source_url": "https://www.youtube.com/@japan-dev",
      "source_url_note": "Koinon retains one profile-level source URL, not a per-post URL for each excerpt."
    },
    {
      "evidence_id": "youtube_japan-dev#04909b68",
      "type": "creator_content",
      "excerpt": "Vegetable stir-fry vs. pork stir-fry.",
      "source_url": null,
      "source_url_note": "Koinon retains one profile-level source URL, not a per-post URL for each excerpt."
    },
    {
      "evidence_id": "youtube_japan-dev#a4a99596",
      "type": "creator_content",
      "excerpt": "3 Must-Know Interview Tips for Japan",
      "source_url": null,
      "source_url_note": "Koinon retains one profile-level source URL, not a per-post URL for each excerpt."
    },
    {
      "evidence_id": "youtube_japan-dev#5ab6d627",
      "type": "creator_content",
      "excerpt": "New to Japan? This Simple Tip Will Save You Time!",
      "source_url": null,
      "source_url_note": "Koinon retains one profile-level source URL, not a per-post URL for each excerpt."
    },
    {
      "evidence_id": "youtube_japan-dev#f9e66080",
      "type": "creator_content",
      "excerpt": "No One Tells You This About College & Coding Jobs",
      "source_url": null,
      "source_url_note": "Koinon retains one profile-level source URL, not a per-post URL for each excerpt."
    },
    {
      "evidence_id": "youtube_japan-dev#c02391d6",
      "type": "creator_content",
      "excerpt": "Before You Chase Dreams, Know Yourself",
      "source_url": null,
      "source_url_note": "Koinon retains one profile-level source URL, not a per-post URL for each excerpt."
    },
    {
      "evidence_id": "youtube_japan-dev#ac5aaeac",
      "type": "creator_content",
      "excerpt": "The Hardest Choice: Not the Country, But Knowing Yourself",
      "source_url": null,
      "source_url_note": "Koinon retains one profile-level source URL, not a per-post URL for each excerpt."
    },
    {
      "evidence_id": "youtube_japan-dev#50272307",
      "type": "creator_content",
      "excerpt": "The Harsh Truth About H1-B Visa Struggles",
      "source_url": null,
      "source_url_note": "Koinon retains one profile-level source URL, not a per-post URL for each excerpt."
    }
  ],
  "provenance": [
    {
      "field": "audience.description",
      "source_type": "ai_inferred",
      "confidence": 0.6,
      "freshness_days": 0,
      "method": "llm_persona_from_recent_content",
      "note_ref": "llm_persona_from_recent_content"
    },
    {
      "field": "audience.roles",
      "source_type": "ai_inferred",
      "confidence": 0.6,
      "freshness_days": 0,
      "method": "llm_persona_from_recent_content",
      "note_ref": "llm_persona_from_recent_content"
    },
    {
      "field": "audience.seniority",
      "source_type": "ai_inferred",
      "confidence": 0.6,
      "freshness_days": 0,
      "method": "llm_persona_from_recent_content",
      "note_ref": "llm_persona_from_recent_content"
    },
    {
      "field": "commercial.audience_buyer_fit",
      "source_type": "ai_inferred",
      "confidence": 0.6,
      "freshness_days": 0,
      "method": "llm_scorer",
      "note": "Relative signal within Koinon indexing, not a market-wide score."
    },
    {
      "field": "commercial.promotion_intent",
      "source_type": "ai_inferred",
      "confidence": 0.6,
      "freshness_days": 0,
      "method": "llm_scorer"
    },
    {
      "field": "quality.anomaly_flags",
      "source_type": "heuristic",
      "confidence": 0.5,
      "freshness_days": 0,
      "method": "profile_snapshot_and_engagement_ratio_heuristic",
      "note": "Means \"worth a manual check\", NOT confirmed fraud. Flags can be wrong and are not a verdict about the person."
    },
    {
      "field": "quality.authenticity_score",
      "source_type": "heuristic",
      "confidence": 0.25,
      "freshness_days": 0,
      "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.",
      "note": "The input set differs by platform; do not compare this score across platforms."
    },
    {
      "field": "quality.koinon_bd_grade",
      "source_type": "ai_inferred",
      "confidence": 0.5,
      "freshness_days": 0,
      "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.",
      "note": "Koinon partner-outreach fit, not creator quality."
    },
    {
      "field": "reach.followers",
      "source_type": "observed",
      "confidence": 0.95,
      "freshness_days": 0,
      "method": "platform_profile"
    }
  ],
  "method_notes": {
    "llm_persona_from_recent_content": "Computed from posts read live at analysis time; those posts are NOT retained. The excerpts in evidence[] are separately collected profile content and are NOT the inputs to this inference. Do not cite them as its supporting evidence."
  },
  "freshness": {
    "profile_checked_days_ago": 0,
    "content_analysed_days_ago": 0,
    "audience_updated_days_ago": 0,
    "generated_at": "2026-09-07T02:21:41.544Z"
  },
  "retrieval": {
    "indexing_requests": 1,
    "user_triggered_requests": 0,
    "last_user_triggered_day": null,
    "note": "Being indexed in bulk is not the same as being retrieved to answer a question."
  },
  "relationships": {
    "platform_entity": "https://koinonlink.com/creators/youtube",
    "category_entity": "https://koinonlink.com/product-category/software"
  },
  "license": {
    "terms": "https://koinonlink.com/for-ai",
    "attribution": "Koinon Link",
    "claim_url": "https://koinonlink.com/claim?k=youtube_japan-dev",
    "removal_url": "https://koinonlink.com/claim?k=youtube_japan-dev"
  }
}