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Masuo Yokota

よこた ますお

Yokota Masuo

Pen Names: Masuo Yokota（Used temporarily as a pen name for undercover reporting (changed legal surname temporarily for employment reasons)）

Profile

Gender
Male
Born
1965-01-01 （Fukuoka Prefecture, Japan）
Nationality
Japan
Languages
Japanese

Career

Occupations
Journalist, Non-fiction writer
Active Years
1993-2025

Education

Kwansei Gakuin University
Country: Japan
University of Iowa, School of Journalism
Journalism
Degree: 修士（ジャーナリズム）
Country: United States
Traveled to the U.S. and obtained a master's degree

Awards

Shincho Document Award (19th)
2020
Work: Undercover Report: The Amazon Empire
Organization: Shinchosha
Result: 受賞
Yamamoto Mika Memorial International Journalist Award (9th)
2022
Work: "A Year Inside Trump Supporters": Democracy Died Before My Eyes
Organization: Yamamoto Mika Memorial Foundation
Result: 受賞

Awards & Nominations

Works

Major Works

Undercover Report: The Amazon Empire

2019 Non-fiction / Investigative reportage

An undercover report based on infiltration of Amazon fulfillment centers, documenting harsh working conditions and operational realities. Published in 2019; recipient of the 2020 Shincho Document Award.

Labor issuesCorporate investigationGlobal capitalism

The Light and Shadow of the Uniqlo Empire

2011 Non-fiction / Corporate reportage

A book based on original reporting into Uniqlo (Fast Retailing)'s labor conditions and corporate practices. The publication led to a defamation lawsuit by the company, which was ultimately unsuccessful.

Working conditionsCorporate accountabilityRole of journalism

One Year Infiltrating Uniqlo

2017 Reportage

A reportage based on roughly one year of undercover work at a Uniqlo store, working as a staff member while reporting from within.

Undercover reportingRetail workplaceWorkplace realities

Merciless Delivery: Yamato vs Sagawa vs Japan Post vs Amazon

2015 Non-fiction / Reportage

Investigative reportage on the parcel delivery industry, based on embedded work as delivery drivers' assistants and on-site investigations.

LogisticsLabor issuesIndustrial competition

"A Year Inside Trump Supporters": Democracy Died Before My Eyes

2022 Reportage / Political reporting

A firsthand account of infiltrating Trump campaign operations during the U.S. presidential election, reporting on supporters and effects on democratic processes.

PoliticsElection reportingDemocracy

All Methods of Undercover Reporting: Investigation, Documentation, Fact-checking, Writing and Legal Countermeasures

2024 Non-fiction / Reporting guide

A practical guide compiling techniques for undercover reporting: evidence gathering, fact-checking, writing, and litigation strategies, based on the author's experiences.

Reporting techniquesJournalistic ethicsLegal countermeasures

Bibliography

  • America: A Travelogue on Attitudes Toward Japan (Jouhou Center Publishing, 2003)
  • The Light and Shadow of Amazon.com (Jouhou Center Publishing, 2005)
  • Why Parenting in France is Ten Times Easier than in Japan (Yosensha, 2009)
  • The Light and Shadow of the Uniqlo Empire (Bungeishunju, 2011)
  • Biography: Nancy Seki — A Nancy in One's Heart (Asahi Shimbun Publications, 2012)
  • Junior High School Entrance Exams (Iwanami Shinsho, 2013)
  • Merciless Delivery: Yamato vs Sagawa vs Japan Post vs Amazon (Shogakukan, 2015)
  • One Year Infiltrating Uniqlo (Bungeishunju, 2017)
  • Undercover Report: The Amazon Empire (Shogakukan, 2019)
  • "A Year Inside Trump Supporters": Democracy Died Before My Eyes (Shogakukan, 2022)
  • All Methods of Undercover Reporting (Kadokawa Shinsho, 2024)

Style & Themes

Literary Style
Reportage-style narrationEmbedded/undercover fieldworkFact-centered writing
Recurring Motifs
Workplace environmentsInside corporate structuresPerspective of workers

Legacy

Masuo Yokota is a journalist known for undercover reporting that revealed labor conditions and corporate realities. Through litigation and public debate he has influenced investigative journalism in Japan; he has been awarded and published a practical guide on undercover reporting.

Trivia

  • Temporarily changed his legal surname to facilitate undercover reporting.
  • Faced a defamation lawsuit from Uniqlo (Fast Retailing); the company ultimately lost at the Supreme Court level.
  • Won the 2020 Shincho Document Award for 'Undercover Report: The Amazon Empire'.
  • Won the 2022 Yamamoto Mika Memorial International Journalist Award for 'A Year Inside Trump Supporters'.