⚠ A Contract Is Only as Good as the BuyerLow threat

Mitsui & Co. (8031) — threat to the moat

Mitsui's power profits swing with asset sales even though the output is contracted.

The contribution from Mitsui's IPP businesses fell from ¥34.0 billion to ¥11.8 billion before recovering to ¥28.8 billion1. The swings came mostly from one-off items such as prior-year gains on sales, including the Paiton project, whose absence the company cites in explaining the latest year's profit decline2.

IPP businesses contribution (¥ bn, years to March)34.0202411.8202528.82026Mitsui Integrated Report 2026
Contracted output, volatile accounting.

A long-term contract protects against price but not against a buyer that cannot pay, a regulator that changes the rules or a plant that runs less than expected. Many of Mitsui's buyers are state utilities in emerging markets.

The company's experience with Mainstream3 shows the development side of power is harder.

The latest year's group profit fell 7.4%4 partly because prior-year gains from selling stakes did not recur, including in power5. Selling mature contracted assets and reinvesting the proceeds is part of how Mitsui recycles capital, and it produces this pattern of lumpy reported profit on steady underlying income.

The measure is the IPP contribution without one-off gains. A stable figure would confirm the contracts are doing their work.

References
  1. ReportedThe contribution from Mitsui's IPP businesses fell from ¥34.0 billion to ¥11.8 billion before recovering to ¥28.8 billion.
    Mitsui & Co. Integrated Report 2026, data section - the major affiliates by segment with ownership and share of profit. — FY to March 2022-2026 · publ. 2026 · source ↗
  2. ReportedThe swings came mostly from one-off items such as prior-year gains on sales, including the Paiton project, whose absence the company cites in explaining the latest year's profit decline.
    Mitsui & Co., Consolidated Financial Results for the year ended March 31, 2026 (IFRS) - the consolidated statements of income, financial position and cash flows, segment information, dividends, buybacks and the forecast for the year to March 2027. — FY to March 2026 · publ. 1 May 2026 · source ↗
  3. ReportedThe company's experience with Mainstream shows the development side of power is harder.
    Mitsui & Co., Consolidated Financial Results for the year ended March 31, 2026 (IFRS) - the JA Mitsui Leasing and Mainstream losses, the Russian LNG exposure, the Strait of Hormuz and the sensitivities. — FY to March 2026 · publ. 1 May 2026 · source ↗
  4. ReportedThe latest year's group profit fell 7.4% partly because prior-year gains from selling stakes did not recur, including in power.
    Mitsui & Co., Consolidated Financial Results for the year ended March 31, 2026 (IFRS) - the consolidated statements of income, financial position and cash flows, segment information, dividends, buybacks and the forecast for the year to March 2027. — FY to March 2026 · publ. 1 May 2026 · source ↗
  5. ReportedThe latest year's group profit fell 7.4% partly because prior-year gains from selling stakes did not recur, including in power.
    Mitsui & Co., Consolidated Financial Results for the year ended March 31, 2026 (IFRS) - the consolidated statements of income, financial position and cash flows, segment information, dividends, buybacks and the forecast for the year to March 2027. — FY to March 2026 · publ. 1 May 2026 · source ↗
Sources
Generated September 24, 2026