[Case001] When EBITDA Is Four Times Too High: Hidden Risks in Japanese SME Due Diligence

Foreign buyers often underestimate how Japanese SME accounting practices can distort reported profitability. In a recent engagement, normalized EBITDA diverged from the reported figure by a factor of four.

The target was a steel processing manufacturer with a near-breakeven recovery following a sharp operating loss the prior year. The seller presented this as a turnaround. Due diligence told a different story.

The Accounting Pattern

Three distinct issues were identified, each deferring costs and liabilities into future periods.

Suspended Depreciation

Depreciation on buildings and machinery had been halted for two consecutive years as profitability deteriorated.

Cash-Basis Recording of Liabilities

Consumption tax obligations and corporate credit card expenses were recorded on a cash payment basis rather than accrual, pushing liabilities forward.

Capitalized Maintenance

Maintenance costs were capitalized as fixed assets rather than expensed.

Individually, each item might be dismissed as informal practice. Collectively, they all ran in the same direction—and Japanese SME accounting, governed by a relaxed framework designed for smaller companies, does little to prevent it. For a foreign buyer anchoring valuation to reported earnings, the gap is immediate and material.

The Keiretsu Shadow

The business structure carried its own risks, ones easy to miss without familiarity with Japan’s industrial supply chain dynamics.

The company’s entire revenue came from a single customer—a tier-one supplier to a major automotive OEM. To a foreign buyer, a long-standing relationship with a household-name manufacturer might read as stability. In practice, it was dependency. Raw materials were fully supplied by the customer, capital expenditure required customer approval, and production volumes were dictated entirely by the OEM’s scheduling. When the OEM faced a supply chain scandal, revenues fell nearly 50% in a single fiscal year. Management had no independent ability to plan production or build a forward-looking business plan—a reality that only emerged through direct management interviews.

This is not an anomaly. It is a structural feature of Japan’s subcontracting ecosystem that foreign buyers consistently underestimate.

What the Sell-Side Did Not Volunteer

The disclosure dynamic was equally instructive. The target’s responses to due diligence questions were consistently reactive—answers emerged when pressed, but material information was never volunteered. Responses on the specific accounting items above were notably vague. It is difficult to conclude that the sell-side advisor was unaware of these issues.

This pattern is Japan-specific. The domestic M&A intermediary market operates under disclosure norms that differ meaningfully from those in the US or Europe. In this environment, the quality of the buy-side due diligence team—and their ability to surface what is not being offered—is the primary line of defense.

The Broader Lesson

Japan offers genuine acquisition opportunities. Realizing value from them requires advisors who understand not just the numbers, but the accounting frameworks those numbers were prepared under, the industrial structures that shape the business, and the disclosure norms that govern what gets shared and what does not.

In this case, the difference was a fourfold gap in EBITDA. For foreign buyers evaluating Japanese SMEs, local due diligence is not optional—it is essential.