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Sources & methodology

Factual claims are backed by sources such as these.

  1. [1]Basic Survey on Wage Structure (賃金構造基本統計調査) — Ministry of Health, Labour and Welfare (厚生労働省)Primary(accessed Jul 26, 2026)
  2. [2]Statistical Survey of Actual Status for Salary in the Private Sector (民間給与実態統計調査) — National Tax Agency (国税庁)Primary(accessed Jul 26, 2026)
  3. [3]e-Stat — Portal Site of Official Statistics of Japan — Statistics Bureau of JapanPrimary(accessed Jul 26, 2026)
  4. [4]Education and Training Benefit System (教育訓練給付制度) — Ministry of Health, Labour and Welfare (厚生労働省)Primary(accessed Jul 26, 2026)
  5. [5]AWS Certification — Amazon Web ServicesPrimary(accessed Jul 26, 2026)
  6. [6]Google Cloud Certification — GooglePrimary(accessed Jul 26, 2026)
  7. [7]PMP Certification — Project Management InstitutePrimary(accessed Jul 26, 2026)
  8. [8]Japanese-Language Proficiency Test (JLPT) — Japan Foundation & JEESPrimary(accessed Jul 26, 2026)
  9. [9]Information-Technology Engineers Examination (情報処理技術者試験) — IPA (情報処理推進機構)Primary(accessed Jul 26, 2026)
  10. [10]Nissho Bookkeeping Examination (日商簿記検定) — Japan Chamber of Commerce and Industry (日本商工会議所)Primary(accessed Jul 26, 2026)
  11. [11]CompTIA A+ — CompTIAPrimary(accessed Jul 26, 2026)
  12. [12]TOEIC Program — ETS / IIBCPrimary(accessed Jul 26, 2026)
  13. [13]CourseraPrimary(accessed Jul 26, 2026)
  14. [14]UdemyPrimary(accessed Jul 26, 2026)
  15. [15]TechAcademyPrimary(accessed Jul 26, 2026)
  16. [16]LinkedInPrimary(accessed Jul 26, 2026)
  17. [17]WantedlyPrimary(accessed Jul 26, 2026)
  18. [18]dodaPrimary(accessed Jul 26, 2026)
  19. [19]GreenPrimary(accessed Jul 26, 2026)
  20. [20]BizReachPrimary(accessed Jul 26, 2026)
  21. [21]Japan DevPrimary(accessed Jul 26, 2026)
  22. [22]TokyoDevPrimary(accessed Jul 26, 2026)
  23. [23]GaijinPot JobsPrimary(accessed Jul 26, 2026)
  24. [24]Indeed JapanPrimary(accessed Jul 26, 2026)
  25. [25]Rikunabi NEXT (リクナビNEXT)Primary(accessed Jul 26, 2026)
  26. [26]Robert Walters JapanPrimary(accessed Jul 26, 2026)
  27. [27]Michael Page JapanPrimary(accessed Jul 26, 2026)
  28. [28]Hays JapanPrimary(accessed Jul 26, 2026)
  29. [29]en world JapanPrimary(accessed Jul 26, 2026)
  30. [30]NotionPrimary(accessed Jul 26, 2026)
  31. [31]SlackPrimary(accessed Jul 26, 2026)
  32. [32]ZoomPrimary(accessed Jul 26, 2026)
  33. [33]Google WorkspacePrimary(accessed Jul 26, 2026)
  34. [34]AsanaPrimary(accessed Jul 26, 2026)
  35. [35]Toggl TrackPrimary(accessed Jul 26, 2026)
  36. [36]1PasswordPrimary(accessed Jul 26, 2026)
  37. [37]FigmaPrimary(accessed Jul 26, 2026)
  38. [38]freeePrimary(accessed Jul 26, 2026)
  39. [39]Money ForwardPrimary(accessed Jul 26, 2026)