Four Rental Spaces Generating ¥360,000 in Monthly Profit. 30% Fees, ¥450,000–700,000 Upfront — the Going Rates of the Hourly-Rental Market

The published numbers

Read this not as a personal success story, but as the industry’s income statement

The author, Kenji Sato, is a serial entrepreneur who went from side business to founding and exiting companies through multiple M&A deals, and now works in M&A and startup consulting. This note, published in May 2026, reads less like a personal war story and more like a market report bundling the rental-space market’s rates, fees, upfront costs, and profit distribution. Even the headline “¥360,000 in monthly profit” is presented within the document as a reported case of an individual side-business operator running four rental studios — paired with the operational reality of just 3 hours of work per month.

The document’s real value lies not in a winner’s numbers but in showing the distribution of entrants. About 30% run a loss in their first year, the standard tier of about 40% earns ¥50,000–100,000 in monthly profit, and only the top 10% clear ¥200,000 per month. Rental spaces are not a market where “anyone can make money”, like stock photography, where the median is ¥4,000 a month, it is a market where only the right tail of the distribution gets visibility on social media. The ¥360,000 monthly profit is not one location hitting a jackpot but the sum of four locations (averaging ¥90,000 each), the upper edge of the standard tier multiplied across multiple locations, a number whose replication path is visible.

What is changing in the 2026 market

The document’s 2026 trends boil down to four points. Listings on platforms like Space Market, Instabase, and Spacee are up 20% year over year, supply keeps growing. Meanwhile, the low-price band of ¥1,500–3,000 per hour is being weeded out, and the core price band has shifted upward to ¥3,500–5,000. Use cases have moved from the “big box for anything” model toward niche-specialized formats (photo studios, party rooms, dance and yoga, cooking classes) and unmanned operation automated through smart locks and integration tools has become standard equipment.

Read in this context, the “3 hours a month” figure takes on a different meaning. Four locations can run on 3 hours a month only because the entire workflow (booking, payment, entry and exit, cleaning) is automated through tools and outsourcing; it works out to 45 minutes per location per month. The bottleneck in this business is therefore not operating labor but whether you can fully wire up the automation at launch, the exit pattern described later (manual booking management devouring all your side-business hours) is the flip side of the same coin.

Supply growing 20% while prices rise looks contradictory at first, but it makes sense once you read it as “cheap, featureless boxes” sinking in a price war while bookings concentrate in “spaces with a clear use case that can command a rate.” The pressure of oversupply is not spread evenly across the market. It falls selectively on the undifferentiated bottom tier.

Reducing the break-even to a formula

Fees take 30–35% of revenue off the top, and rent of ¥100,000–150,000 sits on it as a fixed cost. In a model case of ¥4,000 per hour × 70 hours a month = ¥280,000 in monthly revenue, subtracting roughly ¥90,000 in fees and ¥120,000 in rent leaves around ¥70,000, profit is the thin residue left after “rate × utilization” clears the break-even point (rent + fees), and the structure makes clear that discounting your rate leads straight to a loss. The weeding out of the low-price band is inevitable. Conversely, the real example’s per-location average of ¥90,000 is no special jackpot. It is merely this model case running slightly above par, and it matches the standard tier of the distribution (¥50,000–100,000 per month).

What separated the winners from those who quit

The common threads among successful operators, as the document describes them, come down to three things: choosing the use case from a local “pain point,” hiring a professional photographer for the listing photos, and systematizing unmanned operation. The typical exits are the mirror image, opening a meeting-room space in a saturated city center and getting dragged into a price war, losing the listing-screen contest with low-quality photos, or managing bookings by hand until the side business consumes all available time. What decides the outcome is not effort after opening but use-case selection before opening and the fixed investments made at opening (photos, automation). This is a business with few variables you can recover on later.

The pitfalls lie outside the P&L, too

The document lists three stumbling blocks: operating on a residential lease in breach of contract, insufficient soundproofing, and overly lenient cancellation policies. None of these show up in the monthly P&L, yet each is the kind of risk that threatens the business’s very survival the moment it surfaces. On the lease issue, Hirosena’s measured-data article likewise identifies securing a sublease-permitted property as the first gate, two independent sources pointing at the same entrance.

One more discount to apply: the author is in the startup-consulting business and has an incentive to talk up the market’s appeal. Even so, the rate benchmarks in this document line up well with the measured figures Hirosena published (around ¥3,000 per hour, roughly 80 hours a month, ¥250,000 in monthly revenue), independent sources whose numbers mesh. The market data itself is presented concretely and verifiably, but there is no need to take the “2026 is the year to get serious” tone at face value. If anything, the fact that the author volunteers the 30%-in-the-red figure is what supports the document’s credibility.

The desk check you can run before entering

The practical entry test comes down to this: observe competitors’ rates and utilization (their booking calendars) in your candidate area for a month, work backward to see whether a rate that clears rent plus fees is achievable, and if it is not, change locations. Because booking calendars are public, this is a rare market where you can roughly estimate a competitor’s revenue before entering, and entries that skip this check are likely the main component of the 30% first-year losses. Read alongside Hirosena’s single-location measurements (¥450,000 upfront, six-month payback), you get both the expected value and the variance of this market.

Related reading

• Hirosena’s three locations and ¥7.5 million — measured unit economics
• Minpaku Fujiya — the lodging version of the same “renting space by the hour” KPIs