Is a coin laundry passive income? ¥150,000-500,000 a month, 7-10 year payback — an owner's numbers

The operator themselves dismantles the premise that “unmanned means passive income”

Coin laundries are often described, in the context of side businesses and land utilization, as “running unmanned” and “passive income.” This note, published in May 2025, comes from someone actually running a coin laundry as a side business, and it directly refutes that framing. The author doesn’t recommend quitting your job to run one full-time, quite the opposite, they state that “starting it as a side business is precisely what allowed for calm decision-making.” What triggered the opening was making productive use of unused land and securing supplementary income, rather than entrepreneurial ambition.

Let’s lay out the published figures before anything else.

The numbers are all presented as ranges rather than a single store’s actual ledger, and that needs to be factored in when reading. But there’s information in how the ranges themselves are constructed.

Combine the ranges honestly, and many stores end up in the red

Multiplying out the published ranges reveals the character of this business. At the low end of monthly revenue (¥150,000) against the low end of fixed costs (¥250,000), a store with underperforming sales runs a ¥100,000 monthly loss even under the lightest-expense assumption. Even at the upper end of revenue (¥500,000), if fixed costs swing to their upper end (¥530,000), the result is a loss.

“Monthly profit of a few tens of thousands to over ¥100,000” only holds for the combination where monthly revenue sits toward the upper range of ¥400,000-500,000 and fixed costs stay in the ¥250,000-300,000 range. The same equipment installed for the same amount produces results that split into profit or loss, which backs up the author’s flat statement that “80% of success factors are determined by location.”

This also lines up with the payback period. Recovering an initial investment of ¥13 million over 7 years requires ¥1.86 million annually, or ¥155,000 monthly, nearly matching the lower end of the loan repayment range (¥150,000-300,000) booked as a fixed cost. In other words, “payback complete” in this business means the day the loan repayment finishes and the ¥150,000-300,000 that had been going to repayment each month starts staying in the owner’s pocket. Conversely, until repayment finishes over that 7-10 year period, the owner’s take-home is fixed at a few tens of thousands to over ¥100,000 a month.

A case shaped by the absence of a turning point

There’s no dramatic turning point in this case. Nowhere is there a description of sales spiking due to some particular initiative. The changes mentioned after opening are limited to a change-machine renovation to support new banknotes, and the introduction of a cashless payment terminal, additional investments in both cases. Neither is an offensive investment aimed at growing sales. Both are equipment upgrades that, if neglected, would leave customers unable to use the machines. While these are said to have ultimately expanded the customer base and raised the store’s value, the sequence is one where “money spent out of necessity happened to pay off later.”

In that sense, the substantive decision-making in this case was essentially finished before opening. The decisive point was the single choice to “start it as a side business rather than quitting the day job.” The author explains the benefit of this as being better able to respond to unexpected expenses, having psychological room for revenue fluctuations, and being able to make calm management decisions. If a business where monthly take-home is a few tens of thousands to over ¥100,000, and from which a new-banknote renovation cost can suddenly fly out, were made the pillar of one’s livelihood, decision-making would inevitably distort under short-term pressure. For this industry, being a side business is the cash-flow design itself, not a matter of mindset.

Why does location account for 80%?

“Location is 80%” gets said about many storefront businesses, but for coin laundries the point carries extra weight. There are three reasons.

To begin with, demand doesn’t travel. A customer carrying laundry won’t go far. The trade area is fixed to a range of a few minutes on foot or by car, and it’s difficult to expand later through advertising. The key points the author lists (securing parking, the density of surrounding housing, distance to competing stores, visibility and accessibility) are all factors fixed at opening that can’t be moved later.

Next, you can’t compete on price. Per-use pricing is a few hundred yen, leaving little room to discount and little room for differentiation that could justify raising prices. What determines revenue is essentially “households passing by the store × their laundry habits,” a range that operational effort can barely move.

Finally, costs are fixed up front. The ¥13-22 million in equipment and the ¥150,000-300,000 monthly repayment cost the same whether customers come or not. Because revenue-variance risk is absorbed by fixed costs, a misjudged location cannot be recovered through operations. The author’s statement that “no matter how good the equipment, if the location is bad, attracting customers will be difficult” points to this asymmetry.

It isn’t unmanned, and it’s at the mercy of the weather

The reality behind “unmanned operation” is also spelled out concretely. Full neglect is impossible, equipment breakdowns, replenishing cash in the change machines, trash disposal and cleaning, and customer inquiries all come up regularly. The author currently has two part-time staff on a regular schedule, handling cleaning as well as explaining how to use the machines and dealing with customers. This is credited with contributing to a reputation as “a store you can use with peace of mind”, notably, the direction taken isn’t toward thorough automation but toward retaining a human presence.

Revenue-swing factors also sit outside the operator’s control. Usage rises during the rainy season and pollen season, and falls off during stretches of clear weather. Gas costs for the dryers and water costs for the washers account for a non-negligible share of revenue, so profit doesn’t scale proportionally even as utilization rises. On top of that, there’s a mismatch in time horizons: equipment life is 10-12 years against a payback period of 7-10 years. The timing when repayment finishes and take-home increases tends to overlap with the timing when equipment replacement investment becomes necessary. This is the largest structural trap in this business when viewed over the long term.

What can and can’t be copied

What’s replicable is the review process. Grasp initial cost, payback period, and running costs as concrete numbers, build multiple income-statement simulation patterns, and design so that even the worst case doesn’t turn a loss. Pre-launch checks (comparing vendors, researching equipment performance, confirming subsidy programs, checking competitors, objectively evaluating the location) are also transferable regardless of industry. On the financing side, financing from the Japan Finance Corporation and municipal equipment-installation or startup-support subsidies are mentioned, but there’s also the practical caveat that since subsidies are often paid out after the fact, the full amount initially needs to be prepared through personal capital or borrowing.

What’s not replicable is the starting condition. This case’s starting point was “having unused land already”. If land needs to be newly acquired, several hundred thousand to several million yen gets added to the initial investment, and even at the same monthly revenue, the payback period becomes an entirely different number. Further, the structure of being able to continue operating at this profit level because of income from a day job also can’t simply be copied as-is. The author states outright that a single store’s profit doesn’t work as a full-time livelihood, and that scaling to a professional operation would require expanding to multiple stores.

The conclusion presented is a conditional endorsement (“with proper preparation and operation, it can become a very attractive option as a side business or land-utilization strategy”) paired with a caveat: “don’t be seduced by the sweet phrase ‘passive income’; make the decision after understanding the realistic numbers and risks.” An article that opens with a monthly revenue range of ¥150,000-500,000 and lands on this conclusion is pointed in the opposite direction from the industry’s promotional language.

Related reading

• An engineer’s side-business rental space: ¥7.5 million in year one across 3 locations — a contrast with an initial cost of ¥450,000, a “hourly-rental without owning equipment” model
• A case of launching a kitchen car in 4 months — the startup cost of a small-scale offline business where equipment investment comes first