Keiretsu & Conglomerates
The interlocking corporate families that built modern Japan — Mitsubishi, Mitsui, Sumitomo and Marubeni and their vast cross-holdings.
The Main Bank System: How Japanese Keiretsu Were Financed
The main bank was lender, shareholder and monitor in one — the financial glue of the keiretsu.
Zaibatsu vs Keiretsu: How Corporate Japan Was Rebuilt
The shift from family-controlled zaibatsu to relational keiretsu is the key to understanding corporate Japan.
Sumitomo: The Keiretsu Built on Copper and Creed
Sumitomo grew from a 17th-century copper mine into a materials-science keiretsu guided by a famous creed.
Mitsui: Inside Japan’s 350-Year-Old Business Empire
Mitsui traces to a 1673 kimono shop and today spans one of the world’s great trading houses.
The Mitsubishi Group: How Japan’s Biggest Keiretsu Works
Mitsubishi is the archetype of the Japanese keiretsu — a 40-firm federation bound by cross-shareholdings and the Friday Conference.
Automotive Giants
The carmakers that defined manufacturing excellence and conquered global roads — Toyota, Honda, Nissan, Mazda and Subaru.
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Electronics & Semiconductors
From the transistor radio to advanced chip tooling — Sony, Panasonic, Tokyo Electron, Renesas and the electronics dynasty.
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Gaming & Entertainment
The studios that shaped global play culture — Nintendo, Sega, Bandai Namco, Square Enix and Capcom.
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Robotics & Precision
The precision engineers behind the world’s factories — FANUC, Yaskawa, Keyence and Japan’s automation supremacy.
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Retail & Consumer Brands
The brands in every home and high street — Uniqlo, Rakuten, MUJI, 7-Eleven Japan and consumer retail power.
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Founders & Leadership
The visionaries behind the empires — Akio Morita, Soichiro Honda, Konosuke Matsushita and Masayoshi Son.
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SoftBank & Tech Investment
Japan’s boldest tech bets — SoftBank, the Vision Fund, LINE and the reshaping of global venture capital.
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Trading Houses & Finance
The sogo shosha and financial giants — Mitsubishi Corp, Itochu, MUFG, Nomura and the trading-house model.
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Startups & Unicorns
The new generation — Mercari, Preferred Networks, SmartNews and Japan’s emerging startup ecosystem.
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Global Expansion & Monozukuri
The philosophy behind the products — kaizen, lean, monozukuri craftsmanship and Japan’s overseas strategy.
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Frequently Asked Questions
What is the Japan Company Stories hub?
It is a curated collection of long-form case studies on Japan’s most influential companies, founders and business philosophies, organized into eleven themes covering automotive, electronics, gaming, robotics, retail, finance, startups and more.
Who are these guides written for?
Founders, investors, operators and students of business who want to understand the strategy and structure behind Japan’s corporate success — not just the news headlines.
What is a keiretsu?
A keiretsu is a set of Japanese companies linked by cross-shareholdings and long-term business relationships, often centered on a main bank or trading house. The theme above explores how these structures built and still shape corporate Japan.
How often is the hub updated?
New case studies are added regularly as themes expand. Each article is a standalone 2,000+ word deep dive with original analysis, infographics and internal links to related companies.
