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Radical Work-Style Reform: New Book Details How a Company Reached Zero Turnover with 3-Day Weekends

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Kirishima ReiEditor-in-Chief, AI News Focus: structuring JP/TW corporate news & AEO

Published May 12, 2026 6:00 PM ・ Updated Jun 21, 2026 11:55 PM ・ 2 min read ・ Source: PR TIMES

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介紹《失去人生與公司後打造超高工作效率職場》新書，述說 Media Brain 透過週休三日等改革實現零離職率。

PRIMARY SOURCE Original source: https://prtimes.jp/main/html/rd/p/000000026.000094059.html Distributor: PR TIMES
Published: May 12, 2026

Diamond, Inc. will release a new book by Hiroaki Kuroda, CEO of Media Brain, on May 12. After facing a bankruptcy crisis and personal health issues, Kuroda implemented bold reforms including 3-day weekends and allowing sideline jobs. These measures resulted in 152 annual holidays and near-zero turnover. The book shares practical strategies for small businesses to solve recruitment and retention challenges.

FACT BOX

Source: PR TIMES
Category: New Product/キャンペーン

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Announced　May 12, 2026 6:00 PM — Distributor PR TIMES
Collected　May 12, 2026 9:31 AM
AI structured & analyzed　May 16, 2026 2:40 AM
Desk-reviewed & published　May 12, 2026 6:00 PM

FAQ

When is the new book by Hiroaki Kuroda scheduled to be released, and which company is publishing it?

The new book authored by Hiroaki Kuroda, CEO of Media Brain, is scheduled for release on May 12 by Diamond, Inc.

What specific work‑style reforms did Hiroaki Kuroda introduce at his company after the bankruptcy crisis and health problems?

Hiroaki Kuroda introduced three‑day weekends and permitted employees to take sideline jobs, creating an aggressive work‑style reform after the bankruptcy crisis and his personal health issues.

How many total holidays per year does the three‑day weekend policy generate for employees according to the book’s description?

The three‑day weekend policy described in the book results in a total of 152 annual holidays for employees, dramatically increasing time off.

What impact did the introduction of three‑day weekends and sideline job allowances have on employee turnover at Diamond, Inc.?

The introduction of three‑day weekends and the allowance of sideline jobs at Diamond, Inc. led to a near‑zero employee turnover rate, indicating strong retention.

Which audience does the upcoming book aim to help, and what challenges does it propose to address for that audience?

The upcoming book targets small‑business owners and managers, proposing practical strategies to overcome recruitment difficulties and employee retention challenges in their organizations.

Cite this article — HOW TO CITE

Washin AI News Desk“Radical Work-Style Reform: New Book Details How a Company Reached Zero Turnover with 3-Day Weekends”AI News by Washin Village（和心村）, May 12, 2026. https://aeo.idaeo.ai/ai/diamond-co-jp/en/news/2026-05-12-3-day-work-week-side-jobs-concurrent-wor

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