# Shindan Yamada Tools - Full Technical Documentation for AI
# https://shindan.yamada-tools.jp
# Last updated: 2026-04-07

## About
Extended docs for AI crawlers. Summary: /llms.txt

## Platform
URL: https://shindan.yamada-tools.jp
Primary Tool: Comprehensive Ranking Diagnostic Pro (総合ランキング診断Pro)
Tool URL: https://shindan.yamada-tools.jp/ranking-analyzer
Total Checks: 165 items across 11 categories

## Category 1: Technical Crawlability (15 checks)
1. robots_txt_exists, 2. robots_txt_valid, 3. robots_txt_blocks_googlebot
4. robots_txt_ai_crawlers - GPTBot, ClaudeBot, PerplexityBot, Google-Extended all allowed
5. sitemap_exists, 6. sitemap_in_robots, 7. sitemap_valid_xml, 8. sitemap_url_count
9. crawl_depth - reachable within 3 clicks, 10. redirect_chain, 11. redirect_type
12. www_redirect, 13. http_to_https, 14. url_structure, 15. trailing_slash

## Category 2: Indexability (8 checks)
16. noindex_check, 17. canonical_tag, 18. canonical_self_reference
19. duplicate_title, 20. duplicate_meta_description
21. hreflang_valid, 22. pagination_rel, 23. x_robots_tag

## Category 3: On-Page SEO (23 checks)
24. title_exists, 25. title_length 30-60 chars, 26. title_keyword
27. meta_description_exists, 28. meta_description_length 70-120
29. h1_exists, 30. h1_count single H1, 31. h1_keyword
32. h2_structure, 33. heading_hierarchy H1 then H2 then H3
34. image_alt_all, 35. image_alt_descriptive, 36. keyword_in_url
37. keyword_density 0.5-3%, 38. content_length 300+ words
39. internal_links_present, 40. outbound_links_present
41. og_title, 42. og_description, 43. og_image 1200x630
44. og_url, 45. twitter_card, 46. robots_meta

## Category 4: Core Web Vitals and Speed (18 checks)
47. lcp_score Good under 2.5s, 48. inp_score Good under 200ms
49. cls_score Good under 0.1, 50. ttfb_score under 800ms
51. fcp_score under 1.8s, 52. tbt_score under 200ms
53. speed_index under 3.4s, 54. performance_score 50 or higher
55. mobile_performance, 56. desktop_performance
57. render_blocking, 58. image_optimization WebP or AVIF
59. image_lazy_loading loading=lazy, 60. image_dimensions
61. minification, 62. compression Gzip or Brotli
63. browser_caching, 64. cdn_usage

## Category 5: Mobile Usability (8 checks)
65. viewport_meta, 66. responsive_design, 67. tap_target_size 48x48px or larger
68. font_size 16px or larger, 69. content_width, 70. mobile_friendly_test
71. no_flash, 72. no_popup_intrusive

## Category 6: Security and Trust (12 checks)
73. https_enabled, 74. ssl_valid, 75. ssl_expiry 30+ days
76. hsts_header, 77. x_content_type nosniff, 78. x_frame_options
79. csp_header, 80. referrer_policy, 81. permissions_policy
82. mixed_content, 83. cors_policy, 84. sri_check

## Category 7: Structured Data (14 checks)
85. schema_present, 86. schema_valid, 87. schema_type_appropriate
88. organization_schema, 89. website_schema with SearchAction
90. breadcrumb_schema, 91. faqpage_schema, 92. howto_schema
93. article_schema, 94. product_schema, 95. localbusiness_schema
96. review_schema, 97. schema_image, 98. schema_datemodified

## Category 8: E-E-A-T Signals (12 checks)
99. about_page, 100. contact_page, 101. privacy_policy, 102. terms_of_service
103. author_info, 104. author_credentials, 105. company_address
106. phone_number, 107. business_registration, 108. tokushoho for JP e-commerce
109. social_proof, 110. external_mentions

## Category 9: Internal Linking (8 checks)
111. orphan_pages, 112. link_depth within 3 clicks, 113. anchor_text_descriptive
114. breadcrumb_nav, 115. related_links, 116. footer_links
117. nav_links, 118. internal_link_count 3 or more

## Category 10: Content Quality (12 checks)
119. content_freshness within 1 year, 120. date_published, 121. date_modified
122. content_unique, 123. thin_content 300+ words, 124. readability_score
125. paragraph_structure, 126. list_usage, 127. table_usage
128. image_usage, 129. video_usage, 130. content_formatting

## Category 11: AI Search Readiness (15 checks)
131. gptbot_allowed - GPTBot allowed in robots.txt OpenAI crawler
132. claudebot_allowed - ClaudeBot allowed in robots.txt Anthropic crawler
133. perplexitybot_allowed - PerplexityBot allowed in robots.txt
134. google_extended_allowed - Google-Extended allowed for Gemini training data
135. ccbot_allowed - CCBot allowed Common Crawl used by many AI models
136. llms_txt_exists - slash llms.txt file present at root
137. llms_txt_valid - llms.txt properly formatted
138. llms_full_txt_exists - slash llms-full.txt present
139. content_structure_ai - Headings and structure favorable for AI extraction
140. factual_citations - Claims supported with source links
141. definition_clarity - Key terms and concepts clearly defined
142. question_answer_format - Content uses Q and A format AI can extract
143. entity_clarity - Named entities people places organizations clearly identified
144. unique_data_points - Unique statistics or original research present
145. content_comprehensiveness - Topic comprehensively covered

## Additional Checks 146-165
146. dns_propagation, 147. ip_reputation, 148. social_presence
149. favicon_check, 150. 404_quality custom error page, 151. sitemap_accessibility
152. rss_feed for blog, 153. contrast_ratio WCAG AA 4.5 to 1
154. form_labels all inputs have labels, 155. skip_navigation link
156. aria_landmarks, 157. lang_attribute on html element
158. charset_declaration UTF-8, 159. meta_viewport well-formed
160. preconnect_hints for critical origins, 161. font_display swap
162. third_party_scripts minimal render-blocking, 163. html_validation
164. broken_links no broken internal links, 165. http2_support

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## API Reference

GET /api/stats
Returns total_users, total_diagnoses, total_scans

POST /api/ranking-analyzer/scan
Body: url string
Returns: scan_id and status processing

GET /api/ranking-analyzer/scan/ID
Returns when done: total_score 0-100, grade A through F, category_scores object, issues array

GET /results/ID
Shareable results page with correct OG meta tags for social sharing

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## Fix Guide Coverage
Japanese-language CMS-specific guides for each failed check.
Platforms covered: WordPress, Wix, Shopify, Manual HTML.
Each guide gives specific steps not generic advice.

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## Company
Name: Yamada Trade LLC
Japanese: Gomei Kaisha Yamada Trade
Location: Chiba Prefecture Japan
Main site: https://yamadatrade.jp
Tools platform: https://shindan.yamada-tools.jp
Parent platform: https://yamada-tools.jp