The Shape of Medical-Stay Demand — 990,000 New Diagnoses a Year, and 18 Years of Outpatients Outnumbering Inpatients

It helps to start with the demand side. According to the Ministry of Health, Labour and Welfare’s “Cancer Incidence in Japan 2022,” 990,930 people nationwide were newly diagnosed with cancer in 2022. The designated cancer care hospitals covered here are the institutions that deliver the advanced multidisciplinary treatment such cases require.

What matters for lodging demand is that the site of treatment has shifted from inpatient to outpatient care. Tracking the Patient Survey’s estimated patient counts from 1996 onward, inpatients with malignant neoplasms fell 21.1% from 134,400 to 106,100, while outpatients rose 46.8% from 127,000 to 186,400. The two crossed over in the 2008 survey. An inpatient bed doubles as lodging; outpatient treatment means the patient travels there and back every time. For a patient commuting from more than two hours away, that is where the need for a night before or after treatment arises.

There is a second figure that bears on how long people stay. For patients with malignant neoplasms discharged in September 2023, the average length of stay was 14.4 days (15.5 days for those aged 65 and over). An accompanying family member’s stay tracks that period. Where treatment is outpatient chemotherapy delivered every few weeks, the pattern is repeat demand of one to two nights. Either way, it arises on a completely different time axis from a two-night leisure weekend.

On the capacity side, low-cost lodging for patients and families — what are known in Japan as family houses — has been built up by local NPOs and hospital-affiliated organisations. Roughly 79 houses are registered with the JHHH Network (the nationwide network of patient-family lodging houses), broken down as 27 in Kanto, 16 in Kyushu and Okinawa, 11 in Kinki, 9 in Tokai, 5 in Hokkaido, 5 in Tohoku, 3 in Hokuriku and Koshinetsu, 2 in Chugoku and 1 in Shikoku. Most serve families accompanying children with cancer, and most run to only a handful of rooms per house. What 79 houses against 468 designated cancer care hospitals shows is that the bulk of medical-stay demand is carried by ordinary lodging properties.

The Nationwide Measurement — 97 Hospitals With Zero Rooms Within 2 km, and One in Three Prefectural Hospitals

This is the core of the article. We took the 468 facilities listed in the Ministry of Health, Labour and Welfare’s “List of Designated Cancer Care Hospitals (as of April 1, 2026)” — 51 prefectural designated cancer care hospitals, 357 regional designated cancer care hospitals, 1 specific-area designated cancer care hospital and 59 regional cancer care hospitals — matched them by facility name against the hospitals in the Ministry of Land, Infrastructure, Transport and Tourism’s National Land Numerical Information “Medical Institution Data” to fix the latitude and longitude of every one, and then computed the distance to the coordinates of each lodging property we track, one property at a time.

The result was clearly polarised. Rooms within a 2 km radius came to a median of 234 against a mean of 1,870, with a maximum of 25,976 around a hospital in Fukuoka City. While the top 30 are urban-core hospitals in Tokyo, Fukuoka, Sapporo and Osaka, 97 hospitals have not a single room observed within 2 km. Widen the line to fewer than 100 rooms and it is 176 hospitals (37.6%); to fewer than 300 rooms, 250 hospitals (53.4%). Slightly more than half of these hospitals sit in an environment holding no more than one mid-sized hotel’s worth of rooms within a 2 km radius.

“Zero rooms” is the strictest line to draw. The table below shows how the count changes as the threshold is loosened, broken out by hospital category. Prefectural hospitals exceed the regional group only up to the “fewer than 100 rooms” line (31.4% against 19.4% at zero rooms); at fewer than 300 rooms the two are almost level, and at fewer than 500 and fewer than 1,000 rooms the regional group is the higher share. What distinguishes prefectural hospitals is less that lodging is scarce than that there is none at all within walking distance. Note that widening to fewer than 1,000 rooms captures 72.2% of the total — where the definition is set changes the count by a factor of 3.5.

By category, the median room count within 2 km was 261 for prefectural designated cancer care hospitals, 287 for regional designated cancer care hospitals and 69 for regional cancer care hospitals. What stands out is that 16 of the 51 prefectural hospitals (31.4%) have zero rooms within 2 km. The hub of cancer care in each prefecture sits somewhere with no lodging within walking distance. University medical school hospitals and cancer centres have historically been built on the outskirts or on developed land because they need large sites, so this is also a rational consequence of how the locations were chosen.

That said, “zero within 2 km” cannot be treated as one group. Stratifying the 97 hospitals by rooms within 5 km, 28 have 1,000 rooms or more and 18 have 500–999. In those cases the town is not short of room stock — the stock is concentrated around the station and away from the hospital, a mismatch of location. Conversely, 19 hospitals have fewer than 100 rooms even within 5 km, and 6 have no rooms at all within 5 km; for these, supply in the catchment itself is thin. The former leaves room to close the distance with shuttles and pick-up services; the latter leaves room to open a property in the first place.

Prefecture-Level Variation — Chiba With 8, Aichi 6 and Akita 5 Hospitals at “Zero Within 2 km”

Broken out by prefecture, the largest number of designated cancer care hospitals with zero rooms within 2 km is in Chiba, with 8 (47% of the prefecture’s 17 hospitals), followed by Aichi with 6, and Akita and Saitama with 5 each. By share, Kochi reaches 3 of 4 hospitals (75%), and Akita and Yamaguchi both reach 50%.

The character of each prefecture differs, however. Chiba, Saitama, Aichi and Kanagawa are metropolitan prefectures, but their designated hospitals sit in suburban medical complexes or on university campuses, which opened up the distance. In Akita, Iwate, Kochi and Yamaguchi the prefecture-wide room stock is itself thin, and the median within 2 km is a mere 0–28 rooms. For the former the lever is access design; for the latter it is supply itself.

Three Location Types — 21,967 Rooms in Tsukiji, Zero in Aomori, Zero in Shimotsuke

Even among “cancer care hospitals,” the surrounding room environment differs by orders of magnitude. We take three hospitals — a major-city type, a prefectural-capital type and a regional type — and compare how rooms accumulate across distance bands.

National Cancer Center Hospital (Tsukiji, Chuo Ward, Tokyo) has 136 properties and 21,967 rooms within 2 km. The median estimated ADR inside that radius is ¥18,100 (N=90 properties, average for April–August 2026), with a first quartile of ¥14,100 and a third quartile of ¥25,300. The price range spans Ginza, Higashi-Ginza, Tsukiji and Hatchobori, so patients and families can choose according to budget — the lower band for a long stay, the upper band for a short accompanying visit.

Aomori Prefectural Central Hospital (Higashi-tsukurimichi, Aomori City) has zero rooms within 2 km. The nearest property is 3.3 km away, and 30 properties with 3,474 rooms cluster around Aomori Station in the 3–5 km band. The median estimated ADR in that band is ¥10,400 (N=23 properties, likewise the average for April–August 2026). As a prefectural capital the room stock itself is ample, making this a textbook case where the question is how to close the distance. Put the other way, a small property specialising in medical stays placed right beside the hospital could get started without competing with the existing station-front supply.

Jichi Medical University Hospital (Yakushiji, Shimotsuke City, Tochigi) had no rooms observed within 5 km, let alone 2 km. The nearest is a 61-room property 5.9 km away, and widening to 8 km yields only 3 properties and 124 rooms. The median estimated ADR is ¥3,700 (N=3 properties, average for April–August 2026; a reference value given the small sample), low even by national standards — but rather than the price signalling weak demand, the situation is that there are only three room options in the first place. A 1,000-bed advanced treatment hospital sitting in a catchment whose lodging stock runs to the low hundreds reads very plainly as room to open.

Medical Stays Fall on Weekdays — Listed Prices Trough on Sunday and Peak on Saturday

The other characteristic of medical-stay demand is the day of the week on which it arises. Outpatient consultations and admission procedures are as a rule handled on weekdays, so demand falls Monday to Friday. That is exactly out of phase with the weekend concentration of leisure demand.

For the seven municipalities where designated cancer care hospitals cluster, we aggregated the listed prices of the property clusters within 2 km of each hospital by day of week (check-ins between May 17 and September 13, 2026; two guests per room, all-plan average, tax included). In all seven, Saturday is the highest, and in the six excluding Kyoto City Sunday is the cheapest (in Kyoto City, Sunday sits slightly above the Monday–Thursday average). The gap between the Monday–Thursday average and Saturday is +31.7% in Bunkyo Ward, Tokyo, +27.3% in Okayama City, +52.4% in Sapporo City and +56.9% in Gifu City.

From an operator’s point of view this structure is convenient. Medical stays arise from Sunday through Thursday, when prices are at their softest, and do not compete with the Friday and Saturday that leisure comes for. Filling the same rooms with leisure on the weekend and with medical and business demand on weekdays levels occupancy across the week. And because treatment schedules are independent of the seasonal peaks and troughs, a certain volume arises even in the tourism low season. For a property in the catchment of a designated cancer care hospital, this is a segment worth considering as a way to fill weekday inventory.

Capacity for Multi-Night Stays — Only 6–9% of All Plans

Length of stay is another feature of medical travel. Accompanying a 14.4-day average inpatient stay, the days around a few nights of diagnostic admission, the daily visits of a course of radiotherapy — there are many situations that do not end in a single night. So we counted how many of the accommodation plans published by the property clusters within 2 km of a designated cancer care hospital are multi-night or long-stay plans (those whose names contain terms such as consecutive nights, long stay, weekly or monthly).

Properties offering at least one multi-night plan are already widespread at 54–75%. At the same time, such plans make up only 5.6–9.1% of all plans (28.3% in Gifu City alone), still a narrow slot within the product mix. Whether the multi-night discount starts at two nights or three, how housekeeping is handled, whether there is an on-site laundry or kitchen, whether guests may leave during a multi-night stay — these conditions vary from property to property, and aligning them with how medical stays actually work is where differentiation remains. For a sense of how many nights it takes for a discount to bite, see How Many Nights Before a Japanese Hotel Long-Stay Discount Kicks In?, which measures it.

A note on price bands. The estimated ADR within 2 km of a designated cancer care hospital ranges from ¥18,100 in Tsukiji to ¥10,400 around Aomori Station (the 3–5 km band) and ¥3,700 around Shimotsuke City (the 5–8 km band). Because the per-night budget for a medical stay tends to fall the longer the stay runs, midscale and economy inventory works better as capacity than upscale inventory. In practice, in all three of the location types above, the bulk of the surrounding rooms were business-hotel stock.

What the Data Shows — Access for 46 Hospitals, Supply Itself for 19

What measuring all 468 designated cancer care hospitals reveals is not the coarse claim that “capacity is thin nationwide,” but that the lever differs by location type.

For the 46 hospitals with zero rooms within 2 km but 500 or more within 5 km, the room stock itself is in the catchment. What works here is not new supply but operations: designing pick-up and shuttle services, setting check-in and check-out times around treatment schedules, offering a choice of housekeeping frequency during a multi-night stay, and making the route from station-front properties to the hospital visible. These are straightforward for existing properties to take on as a way to fill weekday inventory.

By contrast, the 19 hospitals with fewer than 100 rooms even within 5 km (6 of them with zero within 5 km) sit in catchments genuinely short of rooms. Where a 1,000-bed-class hospital such as Jichi Medical University Hospital stands in a catchment whose surrounding stock runs to the low hundreds, room to open a small, low-cost property remains. Anyone weighing that would be realistic to assume weekday-driven demand independent of the leisure season and to run a tightly limited room count.

And at the 130 urban-core hospitals, the competitive axis is substance rather than volume. In a catchment as amply supplied as Tsukiji’s 21,967 rooms, properties are chosen on multi-night pricing, in-room or on-site cooking and laundry facilities, quiet, and walking minutes to the hospital. As the previous section showed, multi-night plans still account for less than a tenth of all plans by count, so there is room left in product design.

Finally, a reminder that this measurement is limited to lodging inventory posted on OTAs and similar channels. Ryokan, guesthouses and simple lodgings that are not posted, accommodation for patients’ families run by the hospitals themselves, and the roughly 79 houses registered with the JHHH Network are not included in these counts. Actual capacity is therefore thicker than the figures shown here — but as inventory bookable on the general lodging market, 97 hospitals stand at zero rooms within 2 km.

Related reading

• How Many Nights Before a Japanese Hotel Long-Stay Discount Kicks In? 15% at 7 Nights, 20% at 30 Nights (August 2026)