Setting Materiality When Inventory Dominates the Balance Sheet

For many companies along Tokushima’s industrial coast, inventory is not a supporting line — it is the story of the year. When finished goods, work-in-progress, and spare parts together exceed half of total assets, a generic percentage of revenue produces a materiality figure that feels tidy on a planning memo and useless in the warehouse.

We begin with the users of the statements. Lenders watching working-capital covenants care about inventory valuation and obsolescence differently than minority shareholders watching dividend capacity. That difference changes whether we anchor materiality on profit before tax, equity, or a blended measure that reflects both.

Next comes the nature of the stock. Coastal manufacturers often hold long-lead imported components. A ¥4 million slow-moving lot may be quantitatively small against a ¥2 billion balance sheet and still qualitative if it sits in a single SKU that management has already written off in board minutes but not in the ledger.

Our fieldwork then mirrors that judgement: higher sample sizes on high-value SKUs, tighter cut-off around shipping docks, and explicit discussion with governance when management’s NRV assumptions rest on a single major customer order that has not yet been confirmed.

Materiality is not a formula printed once at kick-off. For inventory-heavy entities we revisit it after interim analytics, especially when currency movements or freight costs have shifted the cost base mid-year.