Field Notes
How inventory observation works on a Japanese factory floor
What auditors actually count, tag, and challenge during year-end inventory observation at manufacturing sites in Japan.
Inventory observation remains one of the most physical parts of a financial statement audit. At a Yamagata parts plant we visited last March, the count began before dawn so night-shift production could pause without losing a full day of output.
What we look for beyond the count sheet
Auditors do not simply watch staff tick boxes. We select locations from the perpetual records, test count those bins ourselves, and then reverse-test from the floor back to the system. Slow-moving tooling and consignment stock are common sources of cut-off error when labels are bilingual or when a customer’s goods sit in the same aisle.
Practical preparation for finance teams
Provide count instructions in Japanese and English if supervisors rotate. Freeze receiving and shipping windows clearly. Mark scrap cages so they are not swept into finished goods. Share the last cycle-count variance report before we arrive — it tells us where the ledger and the floor already disagree.
A calm observation day rarely happens by accident. It follows a count plan that treats the warehouse as part of the financial statements, not as a side chore after the trial balance is printed.