IDeCo

If you have just arrived in Japan — or have lived here for years but never gotten around to investing — the first question is always the same: which account should I open first? Japan offers three main account types for retail investors: the tax-advantaged NISA, the pension-focused iDeCo, and a plain taxable brokerage account. Each serves a different purpose, and picking the wrong one first can cost you years of compound growth or lock away money you actually need. ...

For salaried workers in Japan, building wealth beyond your monthly paycheck feels harder than it should be. The tax system is not exactly designed to reward passive income — but it does offer several well-structured pathways if you know how to use them together. Most foreign professionals in Japan start with NISA or iDeCo. Both are excellent. But there is a third pillar that many overlook entirely: rental real estate investment. When combined thoughtfully with tax-advantaged accounts, real estate can do things that stock market investing simply cannot — most notably, it can reduce the income tax you pay on your salary right now, not decades from now. ...

Japan is one of the most expensive countries in the world to retire in — and one of the least discussed when it comes to financial planning for foreign residents. Whether you arrived on a work visa and quietly became a permanent resident, or you are actively considering making Japan your long-term home, the gap between what the public pension system will pay and what you actually need is almost certainly larger than you think. ...

Japan’s individual-defined-contribution pension plan — called iDeCo (individual-type Defined Contribution pension, or 個人型確定拠出年金) — is one of the most powerful tax-reduction tools available to anyone earning income in Japan. Unlike an ISA or a standard brokerage account, every yen you contribute to iDeCo comes straight off your taxable income with no cap on the deduction rate. If you have never run an iDeCo tax deduction calculator, the numbers can surprise you. ...

This article contains affiliate links. iDeCo Tax Savings Simulator [2026] Just enter your income, occupation, and monthly contribution to automatically calculate your tax savings and projected payout at age 60. Annual Income (gross, in 10,000s JPY) ¥2M¥5,000,000¥15M Occupation (affects contribution limit) Company employee (no corporate pension) — limit ¥23,000/mo Company employee (with corporate DC plan) — limit ¥20,000/mo Company employee (with DB / welfare pension fund) — limit ¥12,000/mo Public servant — limit ¥12,000/mo Self-employed / Freelancer — limit ¥68,000/mo Homemaker (non-working spouse) — limit ¥23,000/mo Monthly Contribution (JPY) ¥5,000¥23,000¥68,000 Expected Annual Return (%) 1%4.0%8% Investment Period (until age 60) 1 yr25 years35 yrs Projected Payout at Age 60 (pre-tax) ¥11,896,000 of which investment gains: ¥4,996,000 Annual Tax Savings ¥55,200 Cumulative Tax Savings ¥1,380,000 Total Contributions (principal) ¥6,900,000 Effective Return (incl. tax savings) +78.2% Calculation notes: Uses a simplified model applying employment income deduction, basic deduction, and estimated social insurance premiums (~14.7%). Actual tax savings vary by individual circumstances. iDeCo contributions are fully deductible from taxable income. iDeCo’s 3 Tax Benefits iDeCo offers tax advantages at 3 stages, making it one of the most powerful tax-saving vehicles available. ...