Tokyo Investor With 30 Million Yen a Year Keeps Janitor Job for Health and Routine

Seven rental flats, but still cleaning corridors

Koichi Matsubara, 56, earns about 30 million yen a year, roughly $203,000, from investments and rental properties. Yet the Tokyo resident still works as a janitor in a residential building, cleaning corridors, sweeping entrances and taking care of small repairs. He keeps the job because he values the activity and routine, rather than because he needs the wages.

Matsubara works four hours a day on three days each week. His pay is about 100,000 yen a month, compared with an average monthly salary in Tokyo of around 350,000 yen. His rental and investment income averages about 2.5 million yen a month, 25 times his janitor wages. The cleaning job gives him something money alone cannot supply: a regular reason to move, meet people and complete useful tasks.

Residents passing him in a corridor may have little idea of his financial position. He owns seven rental flats in Tokyo and nearby suburbs, alongside stocks and investment funds. Local media have used the expression invisible millionaires for people like him, whose substantial assets are hidden behind ordinary clothes, modest homes and unremarkable daily routines.

His financial comfort grew from factory wages, strict saving and a small first property purchase. He did not build his fortune through a sudden windfall or a series of risky bets. His story brings together two choices that can seem unlikely companions: building enough wealth to make paid work optional, then continuing to do work that many people overlook.

Matsubara also keeps his personal spending restrained. He cooks at home, usually travels by bicycle, uses a basic smartphone and watches his utility bills. His approach to money runs through both sides of his life: acquiring assets patiently and avoiding the pressure to display what they earn.

How factory wages became a property portfolio

Matsubara grew up in a household with one parent and developed strict saving habits early. After secondary school, he joined a factory and earned about 180,000 yen a month. Over a few years, he put aside roughly 3 million yen, creating the starting fund for his first investment in housing.

He bought a small studio apartment during a weak period in the property market. His savings supplied the down payment, the initial amount a buyer pays before borrowing the rest. He then concentrated on keeping the apartment occupied and paying off the mortgage ahead of schedule.

Rent supplied cash coming in, while mortgage repayments gradually increased his equity, the part of the property he owned after subtracting the remaining loan. As the debt fell, more of the rental income became available for other purposes. He repeated that process carefully until his holdings reached seven flats.

Japan's property prices fell for years after the bubble burst in the early 1990s. That prolonged slump left pockets of value for buyers who had savings and could wait. Matsubara's first purchase came during a softer market, when a modest apartment offered a starting point for building assets over time.

Compact apartments near railway stations can attract single people and couples when rents are reasonable. Reliable tenants, modest renovations and attention to maintenance help keep money coming in. For an owner following Matsubara's approach, an occupied flat and a manageable loan matter more than the prospect of selling quickly at a higher price.

Why occupied flats and manageable costs matter

Matsubara's method relied on repeating a process he could manage. Savings helped secure a small unit, occupancy supported mortgage payments, and surplus rent could eventually contribute to the next purchase. Each reduction in debt made the existing property less demanding on his finances.

Net yield is one useful measure in that process. It means the rental return after costs, rather than simply the rent collected. Taxes, insurance, repairs and periods without a tenant all affect how much an owner keeps. A flat advertised with a high rent can produce less usable income if those costs are large.

Access to dependable transport was another practical consideration. A compact apartment near trains, universities or employment centres can suit people who need convenient daily journeys. In this approach, location and durability carry more weight than decorative touches or promises of unusually high rent.

Keeping a unit clean and functioning also helps limit vacancies, the periods when nobody is renting it. A slightly higher advertised rent offers little benefit if the property stays empty for longer. Regular upkeep and modest improvements can therefore matter more to returns over many years than squeezing out the highest possible monthly payment.

Tokyo's rental market provides a setting for this strategy. Many buildings near stations contain studios and apartments with one room that suit students and people living alone. Tenants change frequently, but demand is steady. Owners who maintain their units can keep occupancy high even when the wider economy slows.

That environment suits landlords seeking dependable income instead of quick property sales. It also explains why small repairs and everyday cleanliness are part of the financial picture. The condition of a hallway, entrance or apartment affects the experience of the people paying to live there.

Stocks and funds provide another income stream

Matsubara also holds stocks and investment funds. Stocks represent ownership in companies, while funds bring together investments in a collection of assets. They can supply dividends and potential growth without requiring the investor to visit and maintain a physical property.

His mix of assets spreads income across more than one source. A vacant flat or an unexpected repair bill can interrupt rental earnings. Investments outside property offer another stream of income, although market values also change. Rental income and stock investments do not always move together.

Many Japanese savers favour cash and deposits. Household surveys show a large share of assets in those forms, alongside a growing share in funds as knowledge about investing over many years spreads. Tax advantaged programmes and workplace plans have also helped regular investment in broad funds gain ground.

Matsubara's combination of rentals, stocks and funds fits his preference for gradual accumulation. Saving provides the starting money, property produces rent, and financial investments add another source of returns. Keeping several sources helps him manage the uneven expenses that come with owning homes for other people to rent.

A working week built around movement and purpose

Matsubara spends 12 hours each week at his janitor job. Walking through common spaces, lifting, sweeping and cleaning give him regular physical activity. The World Health Organization advises adults to aim for at least 150 minutes of moderate activity each week. His three shifts provide substantial time for movement within an ordinary working routine.

The attraction also goes beyond exercise. Residents rely on someone to tidy entrances, look after shared spaces and deal with small problems. Finishing a cleaning task produces an immediate, visible result. For someone whose investments change value from day to day, that sense of completion can provide a useful source of satisfaction and help reduce stress.

Building work keeps the mind occupied as well. Staff coordinate with residents, solve minor problems and plan maintenance as needs arise. A loose hinge, a delivery or an issue in a shared area gives the working day a concrete task and a reason to interact with someone.

Financial independence changes his relationship with the job. He can value its activity, helpfulness and social contact without relying on the wage to cover his household needs. The role supplies structure and a sense of purpose, while his assets support the freedom to choose that structure.

Many older Tokyo residents return to work in flexible roles after their main careers. Employers value reliability and the ability to deal with tenants. Short shifts in residential buildings can make work easier to fit around health needs and care for family members. Matsubara's schedule reflects that practical balance between remaining active and limiting working hours.

Why he keeps his everyday spending modest

Matsubara lives in a modest apartment rather than a large residence reserved for an owner. Accounts of his lifestyle say he has not bought new clothes in years. Cooking at home, cycling for most trips and using a basic phone keep his routine simple, while careful use of utilities limits recurring bills.

Those choices reflect a preference for independence and a dislike of clutter and attention. He has substantial assets but little interest in turning them into a more conspicuous lifestyle. His spending habits have continued even as his income has grown.

A small household budget also helps when investment income becomes less predictable. Rents can weaken and financial markets can fall. Lower regular expenses make those periods easier to absorb and reduce the pressure to chase higher returns from riskier investments.

Lifestyle creep describes the habit of increasing spending simply because income has risen. A larger home, more expensive purchases and higher recurring bills can gradually absorb the financial freedom that an income increase appeared to offer. Matsubara's restrained spending preserves his ability to accept or decline paid work on his own terms.

His choices also fit habits familiar in Japanese households: keeping spaces tidy, looking after possessions so they last and avoiding waste. Those practices draw on family routines and the country's experience of difficult economic periods. Quietly managing money and taking pride in ordinary work sit comfortably alongside that frugal outlook.

The people who keep residential buildings running

Residential buildings depend on janitors and attendants for work that is easy to miss when it has been done well. They sweep and mop shared areas, maintain places used for rubbish collection and handle small repairs. They also greet delivery workers, watch entryways and alert managers when a problem requires more substantial maintenance.

For residents, the benefits are concrete: a clean lobby, usable common areas and someone who notices when something needs attention. Matsubara's work therefore contributes to the daily comfort of a building even though the wage is a small part of his income.

Older workers fill several of these roles after formal retirement, often choosing flexible hours. The work involves moderate physical effort, and contact with residents can be rewarding. Shorter shifts make it possible to contribute without taking on the demands of a full working week.

Japan's ageing population gives these arrangements a wider importance. The share of people aged 65 and older is among the highest in the world, and participation in work among that age group remains high by international standards. Many companies offer routes back into employment for seniors seeking reduced hours.

Local governments also support programmes that match older workers with jobs suited to their stamina and skills. Light facility work and assistance similar to concierge duties often appear among those roles. Matsubara, at 56, has his own reasons for choosing building work, but his routine sits within this broader pattern of flexible employment.

Pensions provide a financial base, with some scope to claim earlier or later and change the monthly amount received. People with assets or rental income may still choose to work, maintaining social circles, supporting their health and stretching formal benefits. A few days of activity can keep a person mobile and mentally engaged, compared with long periods spent sitting.

Quiet wealth attracts a public response

Matsubara's story spread quickly on social platforms. Many readers praised his careful approach to money and his decision to remain active instead of staying at home. Others focused on the usefulness of his work, pointing out that residents benefit from a clean building every day.

Some commenters questioned whether someone with substantial assets should hold an hourly job. Understanding his reasons shifted the discussion toward exercise, service and routine. His position brings together financial security and ordinary labour, challenging the assumption that a person's job or appearance reveals their wealth.

The expression invisible millionaire describes people whose assets are much greater than their lifestyles suggest. They may own several properties or have sizeable savings while living in modest homes, using public transport, carrying older phones and avoiding luxury brands. Matsubara's bicycle, basic smartphone and simple home reflect a similar preference for privacy over display.

Quiet wealth is not unique to Japan, but it fits local habits around modesty and privacy. Regular saving over decades can create substantial assets without a dramatic turning point. When saving is combined with rental property and patient investing, the result can be a financial position that neighbours or colleagues would never guess.

Matsubara's daily life gives that idea a tangible form. The same person who collects income from seven flats can spend part of his week scrubbing a lobby floor, tightening a loose hinge and greeting neighbours. The work remains useful to him and to the people around him, regardless of the size of his portfolio.

Practical lessons from his choices

Matsubara's experience brings together saving, careful purchases, restrained spending and a chosen routine. These habits support financial and personal stability, although investment results vary. His experience is a gradual story of building assets while keeping ordinary expenses and daily needs in view.

For readers considering rental income or a simpler lifestyle, the practical lessons centre on costs, dependable demand and retaining the freedom to make choices. Health, safety and manageable work remain part of that calculation, alongside returns.

• Begin with disciplined saving and a clear budget. Track spending for several months and identify reductions that protect health and safety.
• For a first rental, consider a small unit where demand is steady. Access to trains, universities and employment centres matters more than decoration.
• Include taxes, insurance, repairs and vacancies when calculating rental income. Give durability more weight than promises of high rent.
• Pay down debt ahead of schedule when cash flow allows. Lower debt reduces financial risk and stress.
• Combine property with broad stock or fund investments to limit reliance on one income source.
• Keep personal expenses aligned with priorities rather than allowing them to rise automatically with income.
• Choose activity or work that fits stamina, skills and available time.
• Protect privacy through modest choices and quiet routines.

Matsubara treats money as a way to support the life he prefers. That life includes physical effort, small responsibilities and contact with neighbours. His wealth has made work optional, while his preference for useful activity has kept it part of the week.

Highlights

• Koichi Matsubara, 56, earns about 30 million yen a year, roughly $203,000, from rentals and investments.
• He works as a residential janitor for four hours on three days each week, earning about 100,000 yen a month.
• He began building wealth with roughly 3 million yen saved from a factory job paying about 180,000 yen monthly.
• His assets include seven rental flats in Tokyo and nearby suburbs, plus stocks and investment funds.
• He keeps working for physical activity, routine, social contact and a sense of purpose.
• His modest spending and preference for privacy fit the idea of invisible millionaires whose wealth is not apparent from daily life.
• His choices sit alongside Japan's wider pattern of flexible work and continued employment as people grow older.