How to Calculate IRR on a Tokyo Apartment (10-Year Hold, Full Worked Example)

TL;DR: Net yield tells you annual income return. IRR tells you total return — income plus capital gain or loss — on every yen invested, accounting for when it moves. For a Tokyo apartment, the difference between a 4.2% net yield and a 6.8% IRR can mean you’re actually doing well even when the monthly cash flow looks thin. The math isn’t hard. Most investors just never run it.

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I closed on a 1LDK in Meguro-ku three years into my portfolio. Net yield at acquisition: 3.9%. Every Tokyo-focused investor I mentioned it to raised an eyebrow. “That’s low.”

On income alone, they were right. But I had a 10-year IRR projection of 7.4% based on my expected exit, and after seven years that scenario is tracking. Net yield is a snapshot. IRR is the whole film.

[OPERATOR NOTE — add your own first-hand detail here: a real deal, number, or scar.]

What Is IRR and Why Does It Matter for Tokyo Property?

IRR — internal rate of return — is the discount rate that makes the net present value of all your cash flows (in and out) equal to zero. Translation: it’s the annualized return that accounts for the timing and size of every cash movement over the life of the investment.

For a property investment, IRR captures:

• Initial cash out (purchase + acquisition costs)
• Net operating income each year (after all costs)
• Debt service if you’re financing
• Proceeds from sale at exit
• Sale costs (agent commission, taxes on gain)

Net yield ignores the sale. Cap rate ignores financing and the sale. IRR ignores nothing.

In Tokyo specifically, IRR is critical because capital values move. Central ward properties have appreciated meaningfully over the past decade. Regional properties have often depreciated. A 4% net yield in Minato-ku with 2% annual appreciation gives you a very different IRR than a 7% net yield in a depreciating market.

Setting Up the 10-Year IRR Model: The Inputs

All figures below are illustrative — representative of this property type in this submarket, not a specific audited transaction.

A 1K in Nakameguro — walking distance to the station, 2005 build, 25 sqm.

Purchase:

• Asking price: ¥18,000,000
• Acquisition costs (agent fee, registration, taxes, scrivener): ¥1,300,000
• Total cash out at Year 0: ¥19,300,000 (assume all-cash for clarity; leverage covered in the FAQ)

Rental income:

• Current rent: ¥110,000/month
• Gross annual rent: ¥1,320,000
• Vacancy allowance: 8% → effective income: ¥1,214,400

Annual operating costs:

• Management fee (6%): ¥72,864
• HOA fee + building repair reserve: ¥168,000 (¥14,000/month)
• Fixed-asset tax + city planning tax: ¥90,000
• Insurance: ¥22,000
• Maintenance/repair reserve: ¥36,000

Net operating income (NOI): ¥1,214,400 − ¥388,864 = ¥825,536/year

Net yield on total invested: ¥825,536 ÷ ¥19,300,000 = 4.28%

The 10-Year Cash Flow Table

IRR needs year-by-year cash flows. Conservative model: rent grows 0.5%/year from Year 3 (when current tenant likely turns over), costs grow 1.5%/year due to rising repair reserves.

Year	Gross Rent	Vacancy	NOI (approx)	Net Cash Flow
1	¥1,320,000	−¥105,600	¥826,000	¥826,000
2	¥1,320,000	−¥105,600	¥820,000	¥820,000
3	¥1,326,600	−¥106,128	¥821,000	¥821,000
4	¥1,333,233	−¥106,659	¥818,000	¥818,000
5	¥1,339,899	−¥107,192	¥815,000	¥815,000
6	¥1,346,599	−¥107,728	¥812,000	¥812,000
7	¥1,353,332	−¥108,267	¥809,000	¥809,000
8	¥1,360,099	−¥108,808	¥806,000	¥806,000
9	¥1,366,899	−¥109,352	¥803,000	¥803,000
10	¥1,373,734	−¥109,899	¥800,000	¥800,000

Small year-on-year NOI decline reflects rising repair reserves and costs growing faster than rents. Realistic for a 2005 build entering its second major maintenance cycle.

The Exit: Sale Price and Net Proceeds

Year 10 exit. The Nakameguro 1K market doesn’t collapse — but it doesn’t boom either. Conservative model: 1% nominal annual capital appreciation on a starting value of ¥18,000,000.

¥18,000,000 × (1.01)^10 = ¥19,876,000 (rounded: ¥19,900,000)

Sale costs:

• Agent commission: 3% + ¥60,000 + tax = approx ¥720,000
• Other closing admin: ¥50,000

Net sale proceeds: ¥19,900,000 − ¥770,000 = ¥19,130,000

Year 10 combined cash flow (NOI + net sale): ¥800,000 + ¥19,130,000 = ¥19,930,000

Calculating the IRR

Cash flow series for IRR:

• Year 0: −¥19,300,000
• Years 1–9: +¥826,000 down to +¥803,000 (as above)
• Year 10: +¥19,930,000

Using Excel/Google Sheets =IRR() on this series: approximately 5.3% IRR

That’s the all-cash, pre-tax, 10-year IRR on this illustrative Nakameguro deal. 5.3%. Not thrilling. But compare it to:

• Japanese savings account: 0.02%
• 10-year Japanese government bond: ~1.5% (as of writing)
• Tokyo REIT index average distribution yield: ~3.5%

And the property has a built-in leverage option, is denominated in yen (no FX risk if you’re already earning yen), and gives you operational control.

Now run the same model with 2% annual capital appreciation instead of 1%:

Exit price: ¥18,000,000 × (1.02)^10 = ¥21,946,000 Net proceeds: ¥21,946,000 − ¥770,000 = ¥21,176,000 Year 10 combined: ¥800,000 + ¥21,176,000 = ¥21,976,000

IRR: approximately 6.5%

The rental income barely changed. The IRR jumped 1.2 percentage points because capital appreciation at exit compounds powerfully. A “low yield” central Tokyo property can still be a good total return investment. Exit assumption carries most of the weight.

Where This Goes Wrong

IRR is sensitive to the exit assumption. Most of your return is in Year 10. Change the assumed exit price by 10% and IRR shifts 0.8–1.2 percentage points. Investors who backsolve a high IRR by plugging in optimistic exit prices are running a confidence exercise, not an analysis.

Japan adds a specific risk: depreciation of the building component. Japanese accounting standards depreciate wooden buildings over 22 years, reinforced concrete over 47 years. At resale, buyers recalculate based on remaining depreciation life. A 2005 RC build is fine for a 10-year hold. A 1990 build might face buyer resistance in 2034 due to remaining life concerns.

Also, capital gains tax in Japan for non-residents on property sale: if held under five years, 30.63% on the gain. Held over five years: 15.315%. Your after-tax IRR depends heavily on hold period. Model both.

FAQ

Q: How does leverage change the IRR? Say you financed 60% (¥10,800,000 loan at 2.5% over 30 years). Your Year 0 cash out drops to about ¥8,500,000 (40% equity + acquisition costs). Annual debt service is approximately ¥511,000. Your net annual cash flow drops sharply — maybe to ¥300,000 early years — but your Year 10 equity payout rises because you’ve been amortizing the loan. On a positive-appreciation scenario, leveraged IRR on equity beats unlevered IRR significantly. On a flat or declining market, leverage destroys equity IRR.

Q: Can I use IRR to compare properties in different cities? Yes, and you should. A 7% gross yield in Sendai might have a much lower IRR than a 4.5% gross yield in Minato-ku if the Sendai property depreciates and the Minato property appreciates. IRR is the only metric that forces you to make your capital appreciation assumption explicit.

Q: What IRR should I target for Japanese residential property? Unlevered, pre-tax, as a rough directional benchmark: 5–7% is typical for quality Tokyo stock. Below 4%, you’re taking real estate illiquidity risk for bond-like returns. Above 8% unlevered, be suspicious of the exit assumption or the true cost structure.

Q: Does IRR account for tax? Not automatically. Build it in by adjusting cash flows — subtract income tax on rental profits each year, adjust the exit for capital gains tax. The after-tax IRR is the number that actually matters. Few investors calculate it correctly.

Q: What software should I use? Google Sheets with =IRR() is enough. Put Year 0 outflow in cell A1, Years 1–10 inflows in A2:A11, and =IRR(A1:A11) gives you the answer. If cash flows vary (they always do), use =XIRR() with actual dates for more precision.