Mitsubishi and Mitsui: The Houses Twice Its SizeThin moat

Marubeni (8002) — moat facet

Mitsubishi and Mitsui can buy the assets Marubeni can only partner in, and the market values them more highly for it.

When a large copper, LNG or iron ore stake comes up for sale, Marubeni bids against houses with much larger balance sheets. Mitsubishi Corporation's market value was ¥17.62 trillion and Mitsui & Co.'s ¥14.63 trillion in September 202612, against Marubeni's ¥8.09 trillion3. Their trailing net profits were ¥895.86 billion and ¥936.38 billion45.

Trailing P/E, September 202620.1Mitsubishi15.8Mitsui14.2Marubenistockanalysis, TYO 8058, 8031 and 8002
The smallest of the three is also the cheapest.

Size matters here in a specific way. A house that can write a ¥800 billion cheque can take on a large operated asset alone; Marubeni's answer has been partnerships in which it holds 12.5% to 30% of a mine operated by someone else6. That works, and it means the largest opportunities go to the largest houses.

The market treats Marubeni differently from them, too: it trades at 14.2 times earnings7, against 20.1 for Mitsubishi and 15.8 for Mitsui89.

The larger houses also earn more per share of market value in some respects: Mitsui's trailing profit of ¥936.38 billion on a ¥14.63 trillion market value10 is a higher earnings yield than Mitsubishi's. Marubeni's ¥576 billion on ¥8.09 trillion1112 is the highest earnings yield of the three.

The measure is the valuation gap. If Marubeni's multiple rises toward the larger houses', investors believe its smaller, partnered model is as good.

Moat trajectory: Holding steady

The size gap is roughly unchanged; Marubeni's multiple remains the lowest of the three.

The number that tests this moat
Reported
Price to earnings against the two largest houses
14.2 against 20.1 (Mitsubishi) and 15.8 (Mitsui)

The market's judgement of the model; convergence would say the partnership approach is valued as highly as outright ownership.

Source: Marubeni market data (stockanalysis) ↗
References
  1. ReportedMitsubishi Corporation's market value was ¥17.62 trillion and Mitsui & Co.'s ¥14.63 trillion in September 2026, against Marubeni's ¥8.09 trillion.
    Mitsubishi Corporation (TYO: 8058) market data - market capitalisation 17.62T yen, trailing net income 895.86B yen and P/E 20.12, September 2026. — September 2026 · publ. September 2026 · source ↗
  2. ReportedMitsubishi Corporation's market value was ¥17.62 trillion and Mitsui & Co.'s ¥14.63 trillion in September 2026, against Marubeni's ¥8.09 trillion.
    Mitsui & Co. (TYO: 8031) market data - market capitalisation 14.63T yen, trailing net income 936.38B yen and P/E 15.75, September 2026. — September 2026 · publ. September 2026 · source ↗
  3. ReportedMitsubishi Corporation's market value was ¥17.62 trillion and Mitsui & Co.'s ¥14.63 trillion in September 2026, against Marubeni's ¥8.09 trillion.
    Marubeni (TYO: 8002) market data - share price, market capitalisation, trailing and forward price/earnings, dividend and yield, and the 52-week range, 24 September 2026. — September 2026 · publ. 24 September 2026 · source ↗
  4. ReportedTheir trailing net profits were ¥895.86 billion and ¥936.38 billion.
    Mitsubishi Corporation (TYO: 8058) market data - market capitalisation 17.62T yen, trailing net income 895.86B yen and P/E 20.12, September 2026. — September 2026 · publ. September 2026 · source ↗
  5. ReportedTheir trailing net profits were ¥895.86 billion and ¥936.38 billion.
    Mitsui & Co. (TYO: 8031) market data - market capitalisation 14.63T yen, trailing net income 936.38B yen and P/E 15.75, September 2026. — September 2026 · publ. September 2026 · source ↗
  6. ReportedA house that can write a ¥800 billion cheque can take on a large operated asset alone; Marubeni's answer has been partnerships in which it holds 12.5% to 30% of a mine operated by someone else.
    Marubeni Corporation, full-year IR presentation for the fiscal year ended March 31, 2026 - net profit of major group companies by segment, with ownership and business descriptions. — FY to March 2026 · publ. 1 May 2026 · source ↗
  7. ReportedThe market treats Marubeni differently from them, too: it trades at 14.2 times earnings, against 20.1 for Mitsubishi and 15.8 for Mitsui.
    Marubeni (TYO: 8002) market data - share price, market capitalisation, trailing and forward price/earnings, dividend and yield, and the 52-week range, 24 September 2026. — September 2026 · publ. 24 September 2026 · source ↗
  8. ReportedThe market treats Marubeni differently from them, too: it trades at 14.2 times earnings, against 20.1 for Mitsubishi and 15.8 for Mitsui.
    Mitsubishi Corporation (TYO: 8058) market data - market capitalisation 17.62T yen, trailing net income 895.86B yen and P/E 20.12, September 2026. — September 2026 · publ. September 2026 · source ↗
  9. ReportedThe market treats Marubeni differently from them, too: it trades at 14.2 times earnings, against 20.1 for Mitsubishi and 15.8 for Mitsui.
    Mitsui & Co. (TYO: 8031) market data - market capitalisation 14.63T yen, trailing net income 936.38B yen and P/E 15.75, September 2026. — September 2026 · publ. September 2026 · source ↗
  10. ReportedThe larger houses also earn more per share of market value in some respects: Mitsui's trailing profit of ¥936.38 billion on a ¥14.63 trillion market value is a higher earnings yield than Mitsubishi's.
    Mitsui & Co. (TYO: 8031) market data - market capitalisation 14.63T yen, trailing net income 936.38B yen and P/E 15.75, September 2026. — September 2026 · publ. September 2026 · source ↗
  11. Moat Explorer calcMarubeni's ¥576 billion on ¥8.09 trillion is the highest earnings yield of the three.
    Moat Explorer calculation from Marubeni's reported figures. Equity-method share of profit before tax: 338.3 / 664.5 = 50.9%. Resources share of adjusted net profit: 147.0 / 480.0 = 30.6%. Investments in associates as a share of total assets: 3,504.2 / 10,531.8 = 33.3%. Segment net profit over segment assets, year to March 2026: Food & Agri 81.5 / 2,700.6 = 3.0%; Metals & Mineral Resources 134.3 / 1,647.6 = 8.2%; Finance, Leasing & Real Estate 162.0 / 1,021.0 = 15.9%; Power & Infrastructure 53.6 / 1,776.1 = 3.0%; Aerospace & Mobility 47.8 / 838.6 = 5.7%; Energy & Chemicals 23.2 / 1,147.6 = 2.0%; Lifestyle 25.9 / 667.6 = 3.9%. Food & Agri net margin on revenue: 81.5 / 3,720.5 = 2.2%. Total payout: (176.5 + 55.0) / 543.9 = 42.6%. Trailing twelve months to June 2026: net profit 543.9 + 186.4 - 154.4 = 575.9; revenue 8,265.8 + 2,609.2 - 2,163.7 = 8,711.3. Net profit growth from the year to March 2016: 543.9 / 62.3 = 8.7 times. Share of the Food & Agri segment's profit from Helena: 37.3 / 81.5 = 45.8%. Dividends received against equity-method income: 220.9 / 338.3 = 65.3%. Berkshire's gain on cost: 4,468 / 1,572 = 2.84 times. Equity growth from currency translation: 345.8 of 734.5 = 47.1%. Market value against the ¥26 trillion that ranked 100th in the world at March 2026: 8.09 / 26 = 31%. Other segments, year to March 2026: IT Solutions 5.4 + Next Generation Business Development 19.6 - Next Generation Corporate Development 1.7 - Other 7.7 = 15.6; with Lifestyle 25.9 the chart's last band is 41.5, and for the year to March 2025 29.5 + 3.5 + 4.7 - 2.2 + 17.3 = 52.8. Trailing P/E: 8.09 / 0.5759 = 14.0. — FY to March 2026 · publ. September 2026 · source ↗
    Method: Arithmetic on figures reported in Marubeni's financial results, integrated report and IR presentations; operands shown in the source line.
  12. ReportedMarubeni's ¥576 billion on ¥8.09 trillion is the highest earnings yield of the three.
    Marubeni (TYO: 8002) market data - share price, market capitalisation, trailing and forward price/earnings, dividend and yield, and the 52-week range, 24 September 2026. — September 2026 · publ. 24 September 2026 · source ↗
Sources
Generated September 24, 2026