Japan’s Silver Week (SW) 2026 runs as a five-day holiday from Saturday, September 19 to Wednesday, September 23. As the first major autumn holiday stretch in 11 years, travel companies are forecasting even heavier congestion than usual. This article reads the booking pace across six onsen and resort destinations — Nagano ryokan, Hakone, Kusatsu, Izu, Karuizawa, and Yufuin — as of 76 days out (observation date = July 6, 2026), using remaining-room-based inventory signals. We present “where things are tightening up right now” from two angles — single-day arrivals on Friday, September 19, and the aggregate over the full five-day holiday (Sept 19–23) — as an in-progress, mid-course snapshot.

76 Days Out: An In-Progress Snapshot as the Premise

From July 6, this article’s observation reference date, there are 76 days until September 19, the first day of SW. This distance occupies an important position in booking-curve analysis. Rather than a stage where hotels have released their full inventory to OTAs, many properties are still mid-course in inventory control (allotment management). Accordingly, what this article calls an “early sell-out” refers strictly to a state in which remaining rooms against the OTA-released allocation have reached zero as of 76 days out. Note that inventory may still remain via a hotel’s own website or through travel agencies, and that hotels may release additional inventory during the LT60–30 window going forward — both possibilities remain open.

Indeed, when we scrutinize the individual-hotel curves across the six areas observed here, we frequently find the pattern of “remaining rooms reach zero once at LT90, then inventory returns in the LT80s.” Rather than a cycle driven by cancellations, this is more naturally read as hotels’ phased inventory release (releasing additional rooms after an initially restricted allotment). Below, we present the structure from two perspectives: the single day and the period aggregate.

Single Day, Friday Sept 19 — Yufuin and Nagano Are Tightening at the Observation Point

First, from the single-day perspective, we compare the booking pace for arrivals on Friday, September 19 — the first day of SW — across the six areas. Within the properties that met the “OTA-released allocation ≥ 30% of total rooms” filter in each area, we counted the number of properties whose Early Sell-Out LT was 70 days or more (i.e., remaining rooms were already zero as of LT70).

Source: MetroEngines Research; compiled by HotelBank Editorial Team

Looking at the raw numbers alone, Yufuin has the most single-day-Sept-19 early sell-out properties with 4, followed by Nagano ryokan and Hakone with 2 each, Kusatsu and Izu with 1 each, and Karuizawa with 0. However, these are “absolute counts of early sell-out properties,” and because the aggregation denominators differ (Yufuin 95 properties, Nagano ryokan 126, Hakone 63, etc.), simple comparison requires caution.

Re-read on a denominator-ratio basis, Yufuin’s 4/95 (4.2%) is the highest among the six areas, followed by Hakone’s 2/63 (3.2%) and Kusatsu’s 1/37 (2.7%). What can be said as of single-day Sept 19 is the in-progress situation that, “in Yufuin and Hakone, 3–4% of the properties releasing 30%+ of their allocation have already experienced a sell-out.” SW’s first day is a Friday, which within the five-day holiday is a relatively light leisure-demand day. The properties showing early sell-outs at this stage are mostly small- to mid-sized, high-rate properties.

Period Aggregate Sept 19–23 — 50 Properties Booking Up in Nagano and Yufuin

While area differences were hard to see on the single day, aggregating over the five-day holiday (Sept 19–23) reveals a completely different picture. For each property, we calculated the average Early Sell-Out LT across the five days and counted those with 70 days or more.

Source: MetroEngines Research; compiled by HotelBank Editorial Team

In the period aggregate, Nagano ryokan and Yufuin are tied at 50 properties each, with Hakone at 35, Izu at 26, Kusatsu at 24, and Karuizawa at 15. Especially notable is that Karuizawa, which was 0 in the single-day view, rises to 15 in the period aggregate. Because a property is counted if its Early Sell-Out LT is high on any one of the five days, this visualizes the pattern of “congestion concentrating when narrowed to a specific day.”

Furthermore, looking at “the number of properties with a sell-out experience on 3 or more of the five days,” Nagano ryokan and Yufuin have 11 each, Hakone 8, Kusatsu 6, Karuizawa 5, and Izu 3. This metric extracts “properties that are firmly capturing multi-night demand.” Nagano ryokan’s 11 represent 5.4% of its 202-property period denominator, and Yufuin’s 11 are 8.7% of its 126 — Yufuin’s booking pace outpaces the other areas in both absolute count and ratio.

Source: MetroEngines Research; compiled by HotelBank Editorial Team

Re-read as a ratio to the period denominator (properties with 30%+ allocation), the distribution is Karuizawa 10.4%, Kusatsu 9.8%, Yufuin 8.7%, Hakone 8.1%, Nagano 5.4%, and Izu 1.9%. On a ratio basis, Karuizawa is highest, with 10.4% of its 48-property denominator having a 3+ day sell-out experience. The reversal in which Karuizawa — 0 properties for single-day Sept 19 — becomes the highest of the six areas when re-read on a ratio basis illustrates the value of reading the period aggregate and single-day aggregate together. Only Izu is markedly low at 1.9%, indicating that multi-night demand over the five-day holiday is still at a limited stage.

A Remaining-Room Signal Table for the 6 Areas — A Two-Axis Single-Day/Period Matrix

We consolidate the two metrics — single day and period — into one table. So readers can grasp “where things are tightening right now” at a glance, we list both denominators and absolute counts, as well as ratios.

Source: MetroEngines Research; compiled by HotelBank Editorial Team. Aggregation period 2026-06-21 to 2026-07-05 (LT90–LT76). Properties with OTA-released allocation below 30% of total rooms are excluded.

Three structural points can be read from this table. First, the area with the most tightening for single-day Sept 19 is Yufuin (4 properties) — combining demand targeting the Friday first day of SW with the pull of Yufuin, one of Kyushu’s premier onsen brands. Second, in the period aggregate, Yufuin’s 39.7% and Kusatsu’s 39.3% are neck-and-neck at the top, followed by Hakone’s 35.4%; properties that have experienced an early sell-out on some day of the five-day holiday reach 3–4 of every 10 in the aggregation set. Third, Izu is geographically large with 1,075 target properties — the most — but its early sell-out ratio is the lowest (16.6%). Dispersion within the area is large, and supply-demand tightness concentrates in a subset of popular properties.

Individual Case Study — The Inventory-Release Behavior of Urakusatsu Tō

The single-day and period aggregates alone make it hard to see what booking curves are actually in motion. So we take up a mid-sized Kusatsu Onsen property, Urakusatsu Tō (裏草津 蕩, 56 rooms), as an individual case and trace the remaining-room trajectory observed between LT90 and LT76. This is the curve for Sept 19 arrivals.

Source: MetroEngines Research; compiled by HotelBank Editorial Team. Urakusatsu Tō (Kusatsu Onsen, 56 rooms), remaining-room trajectory for 2026-09-19 check-in.

At LT90 (observed 6/21), 27 rooms (48.2%) were listed in the OTA-released allocation. From there, over about two weeks to LT83, bookings progressed by two rooms (27→25), and at LT82 (6/29) remaining rooms reached zero. That is this property’s Early Sell-Out LT of 82 days. Inventory then stayed at zero through LT77, but at LT76 (7/5) a new 24 rooms of inventory were released, with the price cut by about 18% from ¥166,700 to ¥137,000.

How should this behavior be read? If it were a simple “cancellation-driven cycle,” the returning inventory would be 1–2 rooms and the price would hold. Given that a large return of 24 rooms and a price change of nearly ¥30,000 occurred simultaneously, this is most naturally seen as a phased additional release by the hotel — the unlocking of an initially restricted allotment, plus a reset of the next-stage pricing strategy. Urakusatsu Tō is a mid-sized property of 56 rooms, and it appears to have adopted an operation of opening at the high ¥166,700 rate initially, then adjusting to ¥137,000 after confirming a slowdown in movement.

Across the Kusatsu Onsen area as a whole, the supply-demand structure within the 5 km radius of the Yubatake and the impact of new openings shape the context; Urakusatsu Tō’s inventory-release behavior is easier to understand when read within it. Tracing the same property’s curve for Sept 20 arrivals shows a shape different from Sept 19: at LT90, 24 rooms (42.9%) were listed, decreasing slowly to 21 rooms by LT85 (down 3), with remaining rooms reaching zero at LT83. The mid-holiday date of Sunday, Sept 20 sold out one LT-day earlier than Friday, Sept 19, suggesting where the period’s demand peak lies — because multi-night bookings are being made in patterns that include the mid-holiday dates.

The Outlook — Movement Is Likely in the LT60–30 Window

The observation point of 76 days out is still a mid-course snapshot. Over the two and a half months remaining until the first day of SW, the following movements can be anticipated.

First, additional inventory releases are likely to occur continuously. As seen in the Urakusatsu Tō case, the operation of releasing an initially restricted allotment in phases is common across many mid- to large-sized properties. In particular, more properties will likely open the next stage by adjusting price, as with ¥137,000. Even if readers feel “it’s full now,” there is ample possibility that inventory returns in the LT60–30 band.

Second, the three mid-holiday days (Sept 20–22), which include the “Citizens’ Holiday” on Tuesday, Sept 22, are likely to tighten fastest within the whole of SW. Because multi-night bookings are built to include the mid-holiday dates, early sell-outs precede on the mid-holiday days even in the single-day view. The early sell-outs visible on Friday, Sept 19 are the “most leading areas and properties,” and the aggregate for Sept 20–22 is expected to show higher numbers than Sept 19.

Third, the booking pace of Yufuin and Nagano ryokan is a notch above the other areas whether viewed by single day, period, or ratio. Read alongside pricing-strategy perspectives, the meaning of the booking pace comes into three dimensions. The backdrop is a structure in which Kyushu’s onsen demand (including inbound) concentrates in Yufuin, and in which Nagano ryokan includes many “1–2 guest small properties,” making OTA-released allocation ratios tend to appear high.

Summary — Booking Pace Looks Different Between Single-Day and Period Views

We observed the booking pace across six areas at 76 days out for SW 2026 using remaining-room-based inventory signals. On single-day Friday, Sept 19, Yufuin had 4 properties and Hakone and Nagano 2 each — limited in absolute count — but reviewing the period aggregate (Sept 19–23) the picture transforms, with Nagano ryokan and Yufuin at 50 each and Hakone at 35. Looking especially at properties with a sell-out experience on 3+ days — 11 each in Yufuin and Nagano, and 8 in Hakone — a certain number of properties firmly capturing multi-night demand already exist.

That said, this observation point of 76 days out is a mid-course snapshot. As confirmed in the Urakusatsu Tō individual case, a property that reached zero remaining rooms once at LT82 was simultaneously releasing 24 additional rooms at ¥137,000 at LT76. Even in areas that look “tight now,” inventory releases are likely to continue in the LT60–30 band. For readers, it is more practical to reference the period-aggregate ratio (the 3+ day sell-out rates of Karuizawa 10.4%, Kusatsu 9.8%, Yufuin 8.7%, Hakone 8.1%, Nagano 5.4%, and Izu 1.9%) rather than the single-day figures as a gauge of the current booking pace.