Why Vertical Farming Needs More Keiretsu (系列, けいれつ)

Japan spent decades building corporate networks around long-term relationships, shared knowledge and mutual dependence. Vertical farming does not need to copy that system. But after another major collapse in CEA, it is worth understanding what made parts of it resilient.

When 80 Acres Farms began winding down in August 2026, the story looked familiar to anyone who has followed controlled-environment agriculture over the past five years: rapid expansion, large amounts of external capital, ambitious technology, and finally a point at which fresh funding could no longer be secured.

The consequences did not stop at the farm operator. On 25 August, 80 Acres Urban Agriculture and 11 affiliates filed for Chapter 7 liquidation in Delaware. Less than three weeks later, Infinite Acres B.V. and Infinite Acres Holding B.V. were declared bankrupt in the Netherlands.

That matters because Infinite Acres had originally been built as a partnership. In 2019, Ocado, Priva and 80 Acres each took one-third of the joint venture. Ocado brought automation and software expertise, Priva horticultural systems and climate control, and 80 Acres plant science and operating experience. On paper, it looked like exactly the type of multidisciplinary alliance vertical farming requires.

But corporate partnerships can change. In October 2021, Ocado sold its 33.3% stake in Infinite Acres to 80 Acres in exchange for 2.5% of 80 Acres’ equity, recording a £5 million gain. By November 2021, 80 Acres had acquired Infinite Acres as a wholly owned subsidiary.

This does not prove that the original partners could or should have prevented the later collapse. Nor does it mean that every joint venture should be permanent. It raises a more useful question: when is a partnership actually a resilient network, rather than just three logos on a press release?

Japan has spent decades experimenting with one answer.

What is keiretsu?

系列, written in hiragana as けいれつ and romanised as keiretsu, can broadly refer to a series, grouping or affiliated line. In business, the term became associated with networks of companies linked through long-term trading relationships, financing, shareholdings, information exchange and, in some cases, personnel ties.

Keiretsu is not a single legal structure. There is no standard “keiretsu contract.” Historically, the term covered different forms of corporate organisation. Academic histories distinguish between the post-war corporate groups that developed from the earlier zaibatsu system and the vertical supplier networks that formed around large industrial manufacturers.

Horizontal keiretsu connected large companies across different industries, often around a major bank and trading company. Mitsubishi, Mitsui and Sumitomo became well-known examples of post-war corporate groups.

Vertical keiretsu developed along supply chains. An industrial company would maintain deep, long-term relationships with specialist suppliers that were legally independent but operationally intertwined.

For vertical farming, the second model is far more interesting.

The important distinction is between a transaction and a relationship infrastructure. A conventional buyer can replace a supplier whenever price or strategy changes. A network member may share engineering knowledge, train people together, coordinate investment and help solve operational problems because its own future is partly tied to the health of the wider network.

Toyota shows what that can mean in a crisis

One of the clearest examples came on 1 February 1997, when a fire shut down an Aisin Seiki plant. Aisin was Toyota’s sole supplier of proportioning valves, or P-valves, a relatively small brake component used across Toyota vehicles.

The situation was particularly dangerous because Toyota’s just-in-time system deliberately kept inventories low. A prolonged disruption at Aisin threatened to stop much of Toyota’s production.

Instead, companies inside and outside the Toyota supplier network reorganised production of the missing part. According to the MIT Sloan Management Review case study of the incident, alternative production sites were established through a largely self-organised response and Toyota’s assembly plants reopened after only two days of shutdown.

The important part was not simply that suppliers “helped Toyota.” The network already had mechanisms that made rapid cooperation possible: accumulated trust, technical knowledge, recurring communication and experience sharing across company boundaries. That network did not have to be invented during the crisis. It existed before the crisis.

Toyota institutionalised this philosophy through supplier associations. The roots of today’s Kyohokai, 協豊会, go back to a supplier organisation created in 1939 and reorganised in 1943. In 2026, Kyohokai lists 227 member companies and describes its purpose around an open global partnership and strong cooperative relationships with Toyota.

Toyota also exported supplier-association structures internationally. Its own corporate history describes associations designed not only to strengthen cooperation between Toyota and suppliers, but also cooperation among suppliers, knowledge exchange and long-term stability.

That difference matters. Western CEA companies often build supply chains; Toyota spent decades building a supplier community.

Keiretsu was more than suppliers

Traditional Japanese corporate networks could also include a main bank. A bank with deep knowledge of the company might provide financing, monitor management and coordinate responses when a member entered financial distress.

Academic work on Japan’s main-bank system found that these relationships could reduce some of the coordination problems that arise when distressed companies have many disconnected creditors. Historical research describes intervention that was often selective rather than automatic: support could involve additional finance, restructuring or management changes.

This is an important correction to the romantic version of keiretsu. The model was never simply “friends rescue friends.”

Its strength came from aligning information and incentives before a crisis. A bank knew the company. Suppliers knew one another. Companies had repeated interactions. Problems were therefore handled within a network that already possessed information, relationships and coordination mechanisms.

For capital-intensive vertical farms, where the failure of an HVAC supplier, software provider, energy contract, retailer or financier can affect the entire operation, that idea deserves attention.

If it worked, why did Japan dismantle so much of it?

Because keiretsu also created serious problems.

Cross-shareholdings could lock capital into companies for strategic or defensive reasons rather than because the investment generated the best return. Friendly shareholders could protect managers from outside pressure. Closed supplier relationships could reduce competition and make it harder for new entrants to win business. Long-term support could delay restructuring of weak companies.

Research on Japanese corporate governance has associated high levels of cross-shareholding with managerial entrenchment and weaker pressure to make difficult investments or restructuring decisions.

Then Japan’s economic environment changed. The asset-price bubble burst, banks accumulated bad loans, capital markets became more important and companies gained alternatives to bank financing. Cross-shareholdings began to unwind rapidly during the 1990s and 2000s.

The change continues today. Japan’s 2026 Corporate Governance Code requires boards to assess individual cross-shareholdings annually, examining whether their purpose is appropriate and whether benefits and risks justify the cost of capital. It also says companies should not obstruct a shareholder that wants to sell by threatening to reduce business transactions, which is close to a direct rejection of the worst form of relationship lock-in.

Yet the same Corporate Governance Code says sustainable corporate value depends on contributions from employees, customers, business partners, creditors and communities, and calls for appropriate cooperation with those stakeholders.

Japan is therefore not simply replacing relationships with pure market transactions. It is trying to separate relationships from entrenchment.

The interesting part of keiretsu is surviving

A 2022 study by Akira Takeishi, Tatsuya Kikutani and Ryuichi Nakamoto examined 1,256 automotive buyer-supplier relationships across 32 years. It found that most Japanese automakers had stopped allocating more business to keiretsu suppliers simply because they belonged to the network. Toyota, however, remained an exception even after controlling for supplier competitiveness and previous transactions.

In other words, the old system weakened, but some relationship-based structures survived where they continued to create value.

Modern Japanese industrial policy also increasingly uses different language: open innovation, co-creation and business ecosystems. In 2025, Japan’s Ministry of Economy, Trade and Industry published Co-Creation Partnership Procurement Guidelines intended to help large companies and startups form medium- and long-term win-win relationships through procurement, including model agreements.

This is not a new form of keiretsu by government decree. But it reflects an interesting evolution: maintain cooperation, remove unnecessary ownership ties, and make the economic purpose of the relationship explicit.

What vertical farming should copy, and what it should leave in the past

The lesson for CEA is not to recreate 1980s Japan. Vertical farms do not need circular shareholdings or suppliers protected from competition.

They may need something between a loose vendor list and full corporate integration.

A practical CEA version could begin with a simple question: which outside relationships can actually kill the business if they fail?

For one farm that might be HVAC and energy. For another it could be proprietary automation, a single seed supplier, a major retailer or a lender.

Those critical partners should not be managed exactly like interchangeable vendors. The relationship can include shared forecasts, technical reviews, failure scenarios, alternative-component plans, training, data exchange rules and clearly defined emergency communication.

At the same time, every critical relationship should have an exit path. Suppliers should remain exposed to performance benchmarks. Operators should understand replacement lead times. Strategic partners should not receive permanent protection simply because they are strategic.

A resilient network therefore combines two ideas that are often treated as opposites: cooperation inside the network, and competition around it.

From bigger companies to stronger networks

Vertical farming has spent much of the last decade asking how quickly farms can scale, how much capital can be raised and how many functions can be integrated into one company.

The collapse of major operators suggests another question deserves equal attention: what remains when the central company fails?

Infinite Acres began with three complementary corporate partners. Years later, the ownership structure had changed, 80 Acres became the sole parent, and the failure of that parent was followed by the bankruptcy of the Dutch technology entities.

That sequence does not prove that a keiretsu-style network would have saved the business. It does illustrate the difference between having partners and designing a system for resilience between partners.

The most useful lesson from Japan is therefore not cross-shareholding, corporate loyalty or protection from failure. It is that resilience can be built between companies, not only inside them.

For vertical farming, the next competitive advantage may not be another larger farm, another proprietary platform or another funding round. It may be a network that already knows what to do when one member suddenly cannot continue.