Yen Depreciation Inflates Equity, Japanese Listed Companies' ROE Edges Down to 9.5%
nashnova research
Japanese listed companies posted record consolidated net profit, yet ROE slipped to 9.5% — a weaker yen inflated overseas-asset translation reserves faster than earnings grew, swelling the denominator and pulling the ratio down.
Record profits — so why did ROE fall?
About 930 non-financial companies on the TSE Prime market posted record consolidated net profit, with net margin rising above 6%.
Yet ROE edged down to 9.5%. This means → earnings grew, but shareholder equity grew faster — the problem is in the denominator.
In plain terms = ROE is profit ÷ equity. When equity balloons more than profit, the ratio shrinks even as the company earns more.
How does the denominator inflate on its own?
The key is foreign-currency translation adjustments — the gap between overseas subsidiaries' assets converted at the period-end exchange rate and equity recorded at the original investment-date rate.
As of March this year, cumulative translation adjustments across Prime-market companies hit ¥49 trillion (roughly $314 billion), up about ¥6.5 trillion year-on-year — a record — and equal to roughly one-tenth of total shareholder equity.
This means → the more the yen depreciates versus the rate at which the investment was made, the larger the yen value of overseas assets becomes, "inflating" equity and compressing ROE.
Many Japanese firms expanded abroad when the yen was strong, making the current exchange rate especially potent.
Which blue-chips were hit hardest?
Fujifilm Holdings: Instax cameras and semiconductor materials drove record net profit, but translation adjustments rose about ¥260 billion year-on-year, pushing ROE down 0.3 pp to 7.7%.
Itochu: ROE fell 1.1 pp to 14.6%, partly because translation adjustments tied to investments including China's CITIC Group rose about ¥380 billion.
Mitsubishi Corp. saw adjustments rise ¥516.3 billion, ROE down 1.8 pp to 8.5%; Mitsui & Co. added ¥555.6 billion, ROE down 1.7 pp to 10.2%.
This reflects a structural exposure: trading houses hold the largest overseas asset bases and absorb the biggest "denominator inflation" from a weak yen.
Who outperformed instead?
Domestically focused companies, less exposed to translation effects, stood out. Advantest rode surging demand for AI-chip test equipment to a 130% jump in net profit, lifting ROE by over 20 pp to 57.6% — the highest in the sample.
Kioxia Holdings hit 51.9% ROE on soaring memory-chip prices; expense-management software firm Rakus rose 10 pp to 55.4%.
In plain terms = companies whose business stays mostly in Japan don't get their equity "inflated" by exchange rates — when profit rises, ROE follows directly.
How wide is the gap with U.S. peers?
The S&P 500 non-financial average ROE for fiscal 2025 was 20.8%, far above Japan's single-digit Prime-market average.
U.S. companies routinely shrink the equity denominator through large dividends and buybacks — Nvidia's $80 billion repurchase plan announced in May is a textbook case.
This means → at the same profit level, U.S. firms actively compress the denominator, naturally boosting ROE; Japanese firms see it passively expand, widening the gap further.
What to watch next?
Shingo Ide, chief equity strategist at NLI Research Institute, said: "Profitability is improving, but equity is growing even faster. Companies need to compress equity through dividends and buybacks while lifting profit via pricing power and productivity."
Currently 60% of Prime-market companies exceed 8% ROE — the investor-expectation benchmark set by METI's corporate-governance reform report — up 4 pp from the prior year.
With the yen unlikely to rebound sharply in the near term, whether capital-return policies can offset translation-adjustment drag on ROE will be the key gauge of real progress in Japan's governance reform.
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