Diamond

Diamond

https://www.diamond.co.jp/

Diamond, a privately owned company headquartered in Japan, was founded in 1913 and employs approximately 210 individuals. Functioning as a tier 1 media tech buyer, the company offers a variety of services including publishing and sales of magazines, books, and digital media, membership-based information services, human resource development support, database services for information provision, and various editing and contract production.

Revenue

Founded

1913

Headcount

202

Headquarters

Japan

Primary Segment

Media and TV services

Ownership

Privately Owned

News Summary:

Diamond Inc. announced on December 24, 2025, that it will host a "Learn 'Drucker Management' in 3 Hours" short intensive seminar for managers and executives. The company will hold the seminar on February 27, 2026, in Tokyo at Hotel Chinzanso Tokyo, and on March 5, 2026, in Osaka at Grand Front Osaka.

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Diamond offers products in the media and telecoms services industry. Diamond's product portfolio comprises of media and TV services.

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Jan

31st

2026

15:30

Capital Investment, B2B Tag

Shigeru-san's 2 a.m. Morning Routine at 89 and Yōkorin's "Operating Profit 10% Rule": Learning the Ultimate Personal Investment Technique

[Translated] Individual investor Shigeru-san ● Started stock investing at age 19. After running a mahjong parlor and other ventures, he became a full‑time investor. Primarily a day trader, he has built assets of 2.5 billion yen.

Jan

20th

2026

12:30

NG Actions When Goals Are Not Achieved: Mr. Sawawatari Amane Talks About the Difference Between People Who Grow From Failure and Those Who Don't

[Translated] [3-Line Summary] ・Mr. Sawawatari, who has supported organizational development for over 400 companies, points out that "cross-border collaboration and co-creation" are important for making goals one's own. ・He says that even if goals are not achieved, by accumulating them as experiences without labeling them as "failures" and learning from reflection, the next career or path will be born.

Jan

10th

2026

01:30

<Weekly Bestseller> Business Book No. 1: 'Breaking Through "PBR Below 1x" the Fastest: Innovation in Capital Cost Management' January 3rd, Yaesu Book Center Gransta Yaesu Store, Business

[Translated] ❶ Breaking Through “PBR Below 1x” the Fastest: Innovation in Capital Cost Management Written by Takafumi Nishimoto (Japan Management Association Management Center, ¥3080) ❷ How to Increase Money Without Being Fooled, in Manga Written by Sho Toriumi

Jan

7th

2026

05:30

Supporting Not Only "Living" but Also "Career Development" as a Rental Management Company for Students: Holding a "Parent-Child Job Hunting Seminar" for Resident Students and Their Parents

[Translated] Student Information Center Co., Ltd. (Kyoto, Kyoto Prefecture, President Kazuki Yoshino, hereinafter "NASIC") held an online "Parent-Child Job Hunting Seminar" on December 10, 2025 (Wednesday) as part of the "NasicCLUB24" program, a service for

Dec

24th

2025

09:59

Short Intensive Seminar for Executives "Learn 'Drucker Management' in 3 Hours" to be Held in Tokyo, Osaka, and Online in February and March 2026!

[Translated] Diamond, Inc. (Headquarters: Shibuya, Tokyo) will hold a short intensive seminar for managers and executives, "Learn 'Drucker Management' in 3 Hours," on February 27, 2026 (Friday) in Tokyo (Hotel Chinzanso Tokyo) and on March 5 (Thursday) in Osaka (Grand Front Osaka).

Dec

18th

2025

06:24

Artificial Intelligence, B2B Tag

note Selected for METI's AI Development Support "GENIAC": Developing "RAG Database" with KADOKAWA and Others

[Translated] note Selected for METI's AI Development Support "GENIAC" note announced on December 19 that its project has been selected for the "GENIAC" generative AI development support project implemented by the Ministry of Economy, Trade and Industry (METI) and the New Energy and Industrial Technology Development Organization (NEDO).

Dec

8th

2025

00:06

Amazon Founder Bezos Talks About the "Essence of Regret" - The One Perspective Lacking in Japanese Companies

[Translated] Koki Sakata, a popular lecturer in the "Conceptualization and Innovation Course" (operated by Aoba-BBT) and a strategy consultant based in Singapore, has recently published "Designing Strategy: 10 Questions to Derive a 'Winning Formula' from Scratch" (Diamond, Inc.), an introductory book that clearly explains how to develop strategies useful for planning new businesses and solving company issues.

Nov

28th

2025

01:34

Book Summary Service "flier" Announces: The Most Read "Business Book" of 2025 is 'What Smart People Think Before Speaking'! Psychologist Yoshito Naito Ranks #1 as "Author" ~ The "Verbalization" Theme Continues to be Popular ~

[Translated] Flyer Inc. (Headquarters: Chiyoda-ku, Tokyo; CEO: Yasushi Oga), which operates the book summary service "flier," with over 1.28 million cumulative members, announced its business book popularity ranking for 2025 on November 28th. The #1 "Most Read Business Book Ranking of 2025" is 'What Smart People Think Before Speaking' (Yuya Adachi / Diamond Inc.).

Nov

24th

2025

00:06

What Exceptionally Capable New Employees Are Thinking

[Translated] "EXPERT: How the Best Get Better" (written by Roger Kneebone, translated by Hidefumi Otachi, Diamond Inc.) is a book that systematically depicts the process of reaching "一流 (first-class/top-tier)" in all fields. Anyone can become first-class by following nine processes, regardless of the field—revealing the universal process through interviews and research with over 30 top-tier individuals such as doctors, pilots, and surgeons.

Sep

30th

2025

18:30

Financial Results, CT_Monitor Company

Hawkeye Gold & Diamond Inc. Reports Earnings Results for the Full Year Ended May 31, 2025

Hawkeye Gold & Diamond Inc. reported earnings results for the full year ended May 31, 2025. For the full year, the company reported net loss was CAD 0.248471 million compared to CAD 0.700641 million a year ago. Basic loss per share from continuing operations was CAD 0.02 compared to CAD 0.07 a year ago. Diluted loss per share from continuing operations was CAD 0.02 compared to CAD 0.07 a year ago.

MarketScreener India

Apr

25th

2025

18:30

Regulatory and Legal, Negative News,

Mumbai Fraud Case: BKC Police Book US-Based Jas Diamond INC Directors For Cheating Merchant Of ₹5.36 Crore

Mumbai: The BKC police have booked three directors of the US-based Jas Diamond INC company for allegedly cheating a diamond merchant out of Rs 5.36 crore. The company had purchased diamonds worth Rs 18.50 crore. They paid 50% of the amount as security and made a few additional payments, and a few diamonds were returned to the merchant.

Free Press Journal

Mar

19th

2025

12:29

ESG, Artificial Intelligence,

Synthetic Diamond Market Set to Witness Significant Growth by 2025-2032 | Adamas One Corp., Applied Diamond Inc

BURLINGAME, CA, UNITED STATES, March 19, 2025 / / -- The latest release from Coherent Market Insights, titled " Research Report 2025-2032", provides an in-depth assessment of the Synthetic Diamond Market by product type, end-user/application, and region.

Diamond has suppliers like Zuora.

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