5333 · NGK Insulators

Will it survive?

• Can it pay its interest? 29.1×
  Comfortable
  Operating income ¥95.0B ÷ interest expense ¥3.3B
  What this means

  Operating profit covers interest with the kind of margin Graham wanted for a defensive holding. Necessary, not sufficient, it says solvent, not cheap.

• How heavy is the debt, net of cash? +¥79.8B
  Net cash
  Cash ¥199.6B + ST investments ¥124.8B − debt ¥244.6B
  What this means

  Cash and short-term investments exceed every dollar of debt by ¥79.8B, on net the company owes nothing, and can act from strength when others can't. Net debt is the leverage figure that matters: the cash is already set against the debt. Strategic or illiquid investments aren't counted here.

• How long is cash tied up? 213d
  Long (60+ days)
  DSO 72 + DIO 179 − DPO 38 days
  What this means

  Days cash is tied up between paying suppliers and collecting from customers. Lower is better; a long cycle means growth itself eats cash.

Is it a good business?

• Return on invested capital 9%
  Solid through the cycle
  10-yr median, range 6%–11%; 11% latest = NOPAT ¥75.0B ÷ invested capital ¥667.0B
  Industry peers: median 8%
  What this means

  The rate the business earns on the money tied up in it, Buffett's north star, because over time a stock tracks the ROIC beneath it. Above ~15% sustained hints at a moat; a return below the cost of capital (~8%) erodes value as a business grows rather than building it — the test Buffett weighs most. The headline is the median of the last 10 years (it ran 11% most recently), so one peak or trough year doesn't set the verdict. Asset-light businesses (R&D expensed, little capital) read artificially high, pair this with Owner Earnings.

• Owner-earnings margin 9%
  Solid through the cycle
  10-yr median margin, range 3%–13%; latest ¥84.8B = operating cash ¥138.0B − maintenance capex ¥53.2B
  Industry peers: median 7%
  What this means

  What an owner could take out without starving the business: operating cash less the maintenance capital it must spend to hold its position — Buffett's owner earnings. That's 13% of revenue this year, a 9% median across 10 years.

• Are earnings backed by cash? 2.30×
  Cash-backed
  Cash from ops ¥138.0B ÷ net income ¥59.9B
  What this means

  How much of reported profit showed up as operating cash. Above 1× is reassuring; well below suggests earnings lean on accruals. One year is noisy, growth and working-capital swings distort it, and this is operating cash, not free cash. Watch the multi-year trend.

How is the cash used?

• Where do the earnings go? 41%
  Returns about half
  Dividends + buybacks ¥34.8B ÷ Owner Earnings ¥84.8B
  What this means

  Of ¥84.8B Owner Earnings, ¥34.8B (41%) went back to shareholders, ¥19.8B dividends, ¥15.0B buybacks. Returning most of it is the mark of a mature business with little left to reinvest at a high return; reinvesting most could mean a long runway, or empire-building. The split doesn't say which; the return earned on it (see ROIC) does.

• Investing or harvesting? 0.93×
  Maintaining
  Capex ¥53.2B ÷ depreciation ¥57.5B
  What this means

  Descriptive, not a grade. Above ~1× means investing faster than assets wear out (growth, or, sustained for years, today's earnings carrying less depreciation than tomorrow's will). Below means spending less than it's wearing out (efficiency, or a melting asset base). The ratio won't tell you which; the filings will.

Durability & moat, 2017–2026

Whether the record’s returns held, and what the capital reinvested earned.

• Profitable years 10 of 10
  What this means

  Never lost money over the record, the earnings stability Graham insisted on.

• Return on capital ≥ 15% 0 of 10 yrs
  What this means

  A moat shows up as a high return on invested capital that holds year after year, not one good vintage.

• Operating margin 15% → 13% (3-yr avg ends)
  What this means

  The recent-years average (13%) sits below the early years (15%), but the latest year (14%) is back near the early level: a cyclical trough dragging the window down, not a one-way slide. The through-cycle median is 13% — read it across the cycle, not on the dip.

• Reinvestment, incremental ROIC 6%
  What this means

  Reinvested capital came back at only a modest incremental return — near the cost of capital, where extra growth adds little per dollar. The record shows whether it is a soft stretch or a thinning moat.

• Owner earnings growth +7%/yr
  What this means

  Owner earnings grew about 7% a year over the record.

• Worst year 2021 · 11.2% op. margin
  What this means

  Stayed profitable even in its hardest year, the resilience that survives recessions.

• Share count −1.3%/yr
  What this means

  The share count is shrinking, buybacks are quietly growing your slice of the business.

• Dividend record rising
  What this means

  Paid and raised the dividend across the record, the continuity Graham prized.