What Diamond Online does

Diamond Online (ダイヤモンド・オンライン) is a subscription-based Japanese business news and information platform operated by Diamond Inc. (ダイヤモンド社), a Japanese publishing company established in 1933. The platform delivers daily business news, in-depth industry analysis, expert commentary, executive compensation rankings, and corporate strategy content across 47 industry verticals including manufacturing, finance, insurance, construction, consulting, IT, AI, energy, healthcare, food, retail, and media. Diamond Premium (ダイヤモンド・プレミアム) provides tiered subscription access with exclusive content and enhanced features, available as both individual and corporate (法人プラン) annual plans for organizational team deployment.

The platform is built on a web-based digital publishing architecture with a content management system and is distributed directly to consumers through diamond.jp and specialized sub-brand sites. Its core technology is standard web publishing; its principal proprietary asset is an extensive editorial content library and proprietary data sets (e.g., executive compensation rankings). The product ecosystem spans Diamond Online core, Diamond Premium, Diamond Premium Corporate Plan, and specialized sub-brands: DIAMOND Harvard Business Review (the Japanese edition of HBR), ZAi Online and ZAi FX (investment and personal finance), Crypto Insight (cryptocurrency), HR Online (human resources), Diamond Education Lab (education), Diamond Quarterly (executive leadership), Oriijin (diversity and inclusion), and Diamond Real Estate Research Institute.

Diamond Online generates revenue through three streams: recurring Diamond Premium subscriptions (individual and corporate), advertising and sponsored/display content across the platform, and B2B corporate services including HR online training programs. Go-to-market is direct-to-consumer via the web platform for individuals, with direct enterprise sales for corporate plans, supplemented by SEO, email newsletters, social media (X, Facebook), executive seminars co-sponsored with PwC Japan, KPMG Japan, Accenture Japan, and PLAID, and an English-language site serving international audiences. The company is privately held with no public listing, and is headquartered in Tokyo, Japan.

Name

Diamond Online

Legal name

Diamond Inc.

Website

https://diamond.jp

Company type

Private

Founded year

1933

Operating status

Operating

Headcount range

1–10 employees

Short description

Diamond Online (ダイヤモンド・オンライン) is a Japanese subscription-based business news platform operated by Diamond Inc. (founded 1933), delivering industry analysis, executive rankings, and expert commentary across 47 verticals to business professionals, individual investors, and corporate subscribers through its main site and 10+ specialized sub-brands.

Ownership category

akta.pro rank

Headquarters

HQ city

Shibuya

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2C

Offering type

Digital Commerce or Content

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Subscription Revenue (Premium Membership): Diamond Premium (ダイヤモンド・プレミアム) subscription service offering exclusive content, detailed analysis articles, and premium features for individual and corporate subscribers
2. Advertising Revenue: Sponsored content and display advertising across the platform, including PR articles, featured sections, and promotional partnerships with various companies
3. Corporate/B2B Services: 法人プラン (Corporate Plan) providing team access for organizations, along with HR online services and training programs through Diamond's human resources development division

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels6 records

Core offering

Diamond Online is a subscription-based online business news and information platform providing articles, rankings, video content, and industry analysis across 47 industry verticals including manufacturing, finance, banking, IT/AI, energy, healthcare, and retail. The platform operates on a tiered model with free content access and a Diamond Premium subscription service offering exclusive in-depth analysis, specialized reports, and enhanced features for individual and corporate subscribers. It is supplemented by an ecosystem of specialized sub-brand sites covering investment, HR, education, cryptocurrency, real estate, and executive management content.

Product overview

Diamond Online (ダイヤモンド・オンライン) operates as a subscription-based online business news platform offering tiered access through its Diamond Premium service (individual and corporate plans). The platform provides comprehensive business coverage across industries including finance, technology, management, and career development, supplemented by an ecosystem of specialized sub-brands: Diamond Education Lab for tutoring and school comparisons, CRYPTO INSIGHT for cryptocurrency information, ZAi ONLINE for investment and personal finance, DIAMOND Quarterly for executive leadership content, HR Online for human resources professionals, Oriijin for diversity and inclusion topics, DIAMOND Harvard Business Review for management scholarship, and Diamond Real Estate Research Institute for property market intelligence.

Differentiator

Problem solved

Functional benefit

Brands

• DIAMONDハーバード・ビジネス・レビュー (DHBR): Japanese edition of Harvard Business Review
• ダイヤモンド・クォータリー
• ザイFX！
• HRオンライン

Named customers2 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

Five partnerships are on record, tiered core.

• PwC Japan GroupcoreStrategic or Co-development PartnerPwC Japan Group co-hosts executive roundtables and seminars with Diamond Quarterly (ダイヤモンドクォータリー), addressing topics on future core business development, M&A strategy, and dynamic growth strategies for Japanese enterprises
• プレイド (PLAID)coreStrategic or Co-development PartnerPLAID co-sponsored Diamond Quarterly executive seminar on AI implementation and enterprise data strategy, focusing on leveraging AI technology and enterprise data for competitive advantage
• アBeam ConsultingcoreStrategic or Co-development PartnerAccenture's Japanese subsidiary co-sponsored Diamond Quarterly events on GX (Green Transformation) and sustainability strategy, addressing corporate sustainability transformation challenges
• KPMG / あずさ監査法人coreStrategic or Co-development PartnerKPMG Japan Group member firm co-authors content on digital transformation, cybersecurity for AI, and organizational DX strategy, providing professional insights for Diamond Quarterly readers
• Harvard Business Review (Japanese Edition)coreStrategic or Co-development PartnerDIAMONDハーバード・ビジネス・レビュー is the Japanese authorized edition of HBR, providing access to global management thinking and business strategy frameworks for Japanese executives

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• ITmedia: Japanese online IT and tech business media platform serving technology professionals and business decision-makers. Comparable to Diamond Online in audience (business and tech professionals), online-first delivery, and topic overlap in IT/AI/technology verticals, with a more tech-focused editorial slant.
• JBpress (Japan Business Press): Japanese online business news and analysis platform under the JBpress/ISMedia umbrella. Comparable to Diamond Online in targeting executive readers with in-depth business analysis and policy commentary, and operates a similar hybrid subscription-advertising model.
• PRESIDENT Online (プレジデント社): Japanese business magazine publisher targeting executives and senior managers, with a robust online presence. Directly comparable to Diamond Online in audience, premium content positioning, and lifestyle/business crossover coverage.
• Nikkei (日本経済新聞社): The dominant Japanese business newspaper and digital media platform serving executives and business professionals. Directly comparable to Diamond Online in target audience (Japanese business readers), subscription model, and broad business news coverage, but operates at materially larger scale with stronger digital subscriber base.
• Toyo Keizai (東洋経済新報社): Long-established Japanese business magazine publisher with a strong online presence (Toyo Keizai Online). Closely comparable to Diamond Online in serving business professionals with paid subscription content, industry analysis, and proprietary company rankings, with similar legacy print-to-digital transition dynamics.
• Business Insider Japan: Japanese edition of Business Insider, providing online business news, tech coverage, and lifestyle content to professionals. Comparable to Diamond Online in audience (business professionals), online-first delivery, and coverage breadth, though with a more international and tech-leaning editorial focus.
• NewsPicks (Userbase): Subscription-based business news curation platform that aggregates commentary from experts and business leaders. Directly comparable to Diamond Premium in offering paid tier business news to professionals, but differentiated by a curation/expert-commentary model vs. Diamond's editorial-first approach.

Broad incumbents

• Nikkei BP: Nikkei Group's business publishing arm covering technology, management, and professional content across multiple magazines and digital sites. A broader incumbent comparable to Diamond Inc.'s portfolio approach, offering overlapping capabilities (IT, management, business strategy) as part of a wider portfolio of publications.
• Bloomberg Japan: Japanese presence of global business news giant Bloomberg. Comparable to Diamond Online in serving finance/investment professionals with business news and analysis, but operates as a global incumbent with far broader resources, terminal products, and international coverage.

Emerging players

• PIVOT: Japanese business video content platform featuring interviews with executives and business leaders. An emerging player in the Japanese business media space with partial overlap to Diamond Online's executive audience, differentiated by a video-first format vs. Diamond's text-led model.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/dol_editors
• Facebookfacebook.com/DiamondOnline

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries5 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Diamond Online