On 26 July 2021, “Amami-Oshima Island, Tokunoshima Island, the northern part of Okinawa Island, and Iriomote Island” were inscribed on the UNESCO World Natural Heritage List. By July 2026, five years had passed. Visitors to Amami Oshima reached roughly 450,000 in 2025, an all-time high — on the demand side, the results are unambiguous. Yet the structure of the room supply meant to absorb that demand has barely changed in five years. This article aggregates the advertised prices and room counts of 225 properties and 2,544 rooms across the 12 municipalities of the Amami Islands, and identifies where the vacant territory lies along two axes: price band and scale.

Conclusion — demand has been renewed in five years; the room mix has not

The conclusion first. Lodging supply in the Amami Islands splits into two poles — practical inns in the ¥10,000s and micro high-rate properties of 1–4 rooms — and the band between them, advertised ¥25,000–60,000 with 20 or more rooms, is structurally thin. Of the 225 properties and 2,544 rooms in scope, only 246 rooms (9.7%) fall in that band. Aggregating Miyakojima and Ishigaki (482 properties, 10,902 rooms) — the comparable island-resort market — on identical criteria, the same band accounts for 2,952 rooms (27.1%).

Looking more closely, Amami Oshima proper (Amami City, Tatsugo, Setouchi, Uken and Yamato; N=167 properties, 1,757 rooms) contains not a single property with 50 or more rooms advertised at ¥25,000 or above. Loosen the threshold to 30 rooms and only three qualify: Amami Hitsujishima Hotel (45 rooms), Coral Palms (35 rooms) and Amami Resort Bashayamamura (31 rooms). Meanwhile 72 properties across the islands are advertised at ¥30,000 or more, but 60 of them (83%) are small properties of 1–4 rooms, and all 72 together total only 357 rooms. High-rate demand clearly exists, but what absorbs it is inventory that never accumulates into room count. That is the central finding of this article.

Why does this constitute an investment theme? Three reasons. First, demand-side indicators have been clearly renewed over five years. Second, in areas where upper-tier properties cluster — Tatsugo in particular — advertised prices rose 21.0% year on year, far outpacing the island-group average. Third, the rooms added in the five years since listing average just 6.9 per property, meaning supply at scale has effectively not increased. We examine each in turn.

Demand — 450,000 visitors, and the change beginning to show in price

Start with the demand side. According to statistics published by Kagoshima Prefecture and the Amami Islands Regional Administrative Association, arrivals into the Amami Islands in 2024 totalled 653,195 (+1.8% year on year), and visitor movements including inter-island travel reached 841,213 (+2.2%), recovering to 94.4% of the pre-COVID 2019 level. Press reports further put visitors to Amami Oshima alone at roughly 450,000 in 2025, an all-time high. The World Natural Heritage inscription came in July 2021, in the middle of the pandemic, so it took time for the effect to show in the numbers — but by year five, demand has fully renewed.

How that demand is reflected in price can be seen in municipal-level advertised-price trends. The two charts below overlay monthly advertised prices for 2024, 2025 and 2026 on a common January–December axis, for Amami City — home to Naze, the main urban centre of Amami Oshima — and for Tatsugo, where upper-tier resorts such as Nest at Amami Beach Villas are located.

Comparing average advertised prices for January–July 2026 against the same period a year earlier: Amami City moved from ¥21,400 to ¥24,400, +14.4%; Tatsugo from ¥23,500 to ¥28,400, +21.0%; and Setouchi from ¥16,400 to ¥17,100, +4.1%. The wide spread in growth rates across the three municipalities matters. Tatsugo is where upper-tier resorts cluster, and it alone grew far above the island-group average. Setouchi, by contrast, is well known as the gateway to Kakeroma Island, but because its supply is centred on practical inns in the ¥10,000s, its room for price growth is structurally capped. Even within the same island, five-year outcomes diverged according to which price band of inventory a place holds. For how the rate hierarchy divides across the island market as a whole, Autumn on Japan’s Islands: 2.37x ADR Gap Across 10 Municipalities sets out the picture across ten municipalities.

On a single-month view, however, July 2026 advertised prices were roughly flat — down 1.7% year on year in Amami City and down 1.6% in Setouchi. The annual level has clearly stepped up, but peak-season prices themselves may already be close to their ceiling. An annual average that rises while the peak does not indicates that the shoulder and low seasons have been lifted. For an investment case premised on year-round operation, that is if anything favourable.

Supply structure — 80% of rooms sit below ¥25,000

Now the supply side. The chart below aggregates the Amami Islands’ 225 properties and 2,544 rooms by advertised price band, alongside Miyakojima plus Ishigaki (482 properties, 10,902 rooms) computed the same way. Note that the vertical axis is the share of rooms, not of properties. What matters for an investment decision is not how many properties sit in a band, but how many rooms.

In the Amami Islands, 46.5% (1,183 rooms) sit below ¥15,000 and 35.5% (903 rooms) in ¥15,000–25,000; those two bands account for 82.0% of all rooms. By contrast ¥25,000–40,000 holds 7.7% (195 rooms) and ¥40,000–60,000 a mere 2.0% (51 rooms). In Miyakojima plus Ishigaki the same two bands hold 16.1% (1,753 rooms) and 11.0% (1,199 rooms) respectively — a decisively different depth in the mid price range. On how Miyakojima and Ishigaki acquired that depth through their supply boom, our analysis of resort condominium investment in Miyako and Yaeyama examines the asymmetry between new supply and yields.

What is interesting is that at the very top the gap narrows. The ¥60,000–100,000 band accounts for 6.8% (173 rooms) in the Amami Islands — thin against the 17.3% (1,891 rooms) of Miyakojima plus Ishigaki, but thicker than the 2.0% in ¥40,000–60,000. In other words, Amami does have “genuinely expensive” places to stay; what is missing is the upper-midscale band just beneath them.

By island, inventory at ¥30,000 or above exists only on Amami Oshima, Tokunoshima and Yoronjima; Okinoerabujima and Kikaijima have none at all. Yoronjima’s 113 rooms are almost entirely a single property, Pricia Resort Yoron (101 rooms), which opened in 1985. Across the whole island group, that one property on Yoronjima is the only one meeting “50+ rooms and advertised ¥25,000 or above.” On the same criteria, Miyakojima plus Ishigaki have 29 properties and 4,700 rooms. Although the Amami Islands’ total room count is 23.3% the size of Miyako plus Ishigaki, in this band they hold just 2.1% — roughly one-tenth of the supply their market size would imply. A similar gap has been observed elsewhere in Kagoshima Prefecture, in the central districts of the mainland side, where the upper-midscale band is likewise absent.

Positioning — map scale against price and the hole appears

Price band alone is not enough to act on. What matters when a development is actually being considered is “at that price band, how many rooms can a hotel viably carry?” The bubble chart below plots room count on the horizontal axis and advertised price on the vertical, for those of the 225 in-scope Amami properties whose room count is known. Bubble size corresponds to review volume — a proxy for the depth of sales history to date.

The chart shows the market splitting into three clear clusters. The dense zone at lower left, 1–10 rooms at ¥5,000–25,000, is where guesthouses, minshuku and small rental villas concentrate. At lower right, a horizontal row of business hotels centred on Naze runs from 70 to 206 rooms at ¥10,000–20,000. And at upper left sits the micro high-rate zone of 1–4 rooms above ¥40,000. Between these three clusters — that is, the upper-right region — is close to empty.

What matters here is that the data shows WS① and WS② are not empty for want of demand. Of the 72 properties advertised at ¥30,000 or above, 60 are micro inventory of 1–4 rooms — and they are actually selling. In other words, demand to stay in Amami at above ¥30,000 does exist, and it is being absorbed by 1–4-room rental villas. The table below ranks properties of 20 rooms or more by advertised price.

Of these 14 properties, only the top five are advertised at ¥30,000 or above — and four of those five have fewer than 50 rooms. The only property above ¥30,000 with 50 or more rooms is Pricia Resort Yoron, which opened in 1985. Turning to guest reviews, the higher-priced properties draw the stronger support. THE SCENE scores 4.48 overall, 4.45 service, 4.43 rooms and 4.42 dining (N=618 reviews) — high across every category — while Nest at Amami Beach Villas stands out on rooms at 4.83 and cleanliness at 4.80 (N=1,267). Amami Hitsujishima Hotel posts 4.72 cleanliness and 4.63 bathroom (N=1,073), sustaining a strong 4.64 overall rating at a ¥33,100 price point. Guest ratings confirm that the properties operating in the upper bands are delivering an experience commensurate with their price.

Mapped geographically, the skew in supply becomes clearer still. On Amami Oshima, business hotels in the ¥10,000s concentrate in Naze (central Amami City), while upper-tier properties are scattered along the east coast of Tatsugo through to Kasari, and at the southern tip of Setouchi. In other words, the “practical inn in town” and the “high-rate property by the sea” are geographically separated as well, and no mid-scale resort combines both characters. Tatsugo and the Kasari area lie 10–20 minutes by car from Amami Airport, with Naze about 50 minutes away — and land meeting the condition of a beachfront site close to the airport remains available.

Who added the supply — 73% more properties in five years, at three rooms each

So how did supply actually move in the five years since the World Natural Heritage listing? We aggregated newly listed properties and their rooms by opening year from the property master.

In the five years before listing (2016–2020), 49 properties and 385 rooms were added; in the five years after (2021–2025), 85 properties and 586 rooms. That is +73% in properties but only +52% in rooms. Break the 586 rooms down further and 341 of them belong to two business hotels in Naze (Hotel Sundays Amami, 206 rooms, and Hotel Yui-ness-Amami, 135 rooms). Excluding those two, the remaining 83 properties total 245 rooms — an average of 3.0 rooms each.

By type, the majority of properties opened since 2021 are rental villas and cottages, followed by guesthouses. In May 2026 a cabin-format property, SANU 2nd Home Amami Oshima 1st, opened in Tatsugo — again a small, distributed format. Despite the arrival of a powerful brand asset in World Natural Heritage status, what the added supply actually consisted of was “small, scattered inventory,” not the mid-scale properties that would move the price ladder up a rung. That is the direct reason WS① and WS② went unfilled for five years.

Widening the view of room supply in the catchment to include listed short-stay inventory does not change the picture. Across Amami City, 74 short-stay listings with a combined capacity of 467 guests can be identified; by capacity band, 18 listings sleep 3–4, 19 sleep 5–6 and 17 sleep 7–10, so more than 70% cluster in the three-plus group and family range. In central Naze (a 3km radius centred on Hotel Sundays Amami), 12 hotels with 747 rooms sit alongside 25 short-stay listings with a combined capacity of 146, or 19.5 short-stay guest places per 100 hotel rooms. Short-stay inventory is competing for the same group-demand segment as the coastal rental villas — not with Naze’s practical inns, and not with the vacant upper-midscale band. Note that “short-stay listing” here is not limited to lodgings registered under the Private Lodging Business Act; it refers to listed short-stay inventory including properties operating under the Hotel Business Act and special-zone rules. Listing counts do not match administrative registration counts.

Site and land price — Naze commercial land at ¥163,500/sqm, rising about 1.5% a year

Next, the land-cost level an investment case requires. According to the Ministry of Land, Infrastructure, Transport and Tourism’s Published Land Prices, Amami City’s 2026 posted land price averaged ¥116,760/sqm (¥385,983 per tsubo), up 1.49% year on year in a gentle continuing rise. By category, commercial land averaged ¥163,500/sqm and residential land ¥85,600/sqm, with the highest point at 14-15 Naze Irifune-cho at ¥172,000/sqm (commercial).

For reference, given that average commercial land in Tokyo’s 23 wards runs to several million yen per square metre, ¥163,500/sqm even for commercial land in Naze puts the site-acquisition hurdle well below that of urban resorts. That said, the coastal areas of Tatsugo and Kasari that would be candidates for resort development have few survey points, so actual prices depend on individual negotiation. Note too that while resort sites carry lower unit prices than urban commercial land, they require a certain plot area, so total land cost varies considerably with the area requirement.

There is one more fact investors should note. In the property master of the seven hotel-specialised J-REITs (Ichigo Hotel REIT, Invincible Investment Corporation, Japan Hotel & Residential REIT, Japan Hotel REIT, Hoshino Resorts REIT, Mori Trust REIT and Kasumigaseki Hotel REIT), the only registered properties in Kagoshima Prefecture are eight in Kagoshima City and Kirishima — not a single property in the Amami Islands. The Amami Islands have no track record of acquisition by a listed REIT, so exit buyers are currently limited to private funds, operating companies and regional capital. This bears directly on the exit assumption in any development scenario.

Development scenarios — 45 rooms at ¥45,000 yields 6.4%, with the island premium priced in

Assuming new development to fill WS① and WS②, we ran simple estimates for three scenarios differing in scale and price band. The assumptions are as follows.

Construction unit cost starts from actual 2025 hotel construction costs based on MLIT’s Building Construction Starts Statistics (steel frame, ¥2.405m per tsubo), to which we add an island premium of 25%. That construction on remote islands exceeds mainland costs is confirmed in several cases: in Chibu Village in the Oki Islands, Shimane Prefecture, the village abandoned a public housing project after costs were projected at about 1.5 times the mainland level, as reported in the press. On Okinawa’s outer islands, the shipping cost of machinery and materials and the scarcity of local contractors are cited as pushing costs 1.3–2 times mainland levels. Amami Oshima lies roughly 380km from mainland Kagoshima, so a material-transport premium is unavoidable. We adopt a conservative 25% here. We then add construction-period inflation, using Turner & Townsend’s construction cost forecast for the Japanese market (+5.3% in 2026, +5.0% in 2027) and, following their view that the pace eases from 2027, provisionally assuming +4.5% from 2028 — giving cumulative growth of +15.5% to the construction midpoint on a 2029 opening. Both stages are shown.

Of the three, the highest yield belongs to Scenario B (45 rooms, assumed room rate ¥45,000), at 6.44% after inflation. Scenario A sets a higher rate but has too few rooms to spread fixed costs, so the yield does not lift. Scenario C generates the largest revenue but assumes a rate cut to ¥35,000, so its return on invested capital falls below B. Scenario B’s assumed rate of ¥45,000 (settled basis, ex-tax) converts to roughly ¥60,000–80,000 on an advertised basis — overlapping the band at which existing properties such as Nest at Amami Beach Villas (advertised ¥64,100) and THE SCENE (¥77,800) actually sell. The estimate does not rest on a price the market has never seen, and that is its essential point.

In the sensitivity analysis, even the worst case — both rate and occupancy below assumption — holds a 5.35% yield. The risk of construction costs overrunning weighs more heavily than movement in rate or occupancy, and the general rule that on remote-island development, precision in managing construction cost decides the outcome more than the revenue assumptions applies here too. Read the other way, high construction costs also work to suppress new entry. For properties already operating, that is an upside factor easing the competitive environment, and the structure rewards projects that reach execution early with greater scarcity value.

Policy tailwinds and risk factors

As external context for an investment decision, it is worth noting policy movements. The Japan Tourism Agency has selected the Amami–Okinawa area as one of 14 model tourism regions nationwide under its programme to build high-value inbound tourism destinations in regional Japan, committing concentrated support for developing luxury lodging and tourism content. The master plan prepared by the Okinawa–Amami Joint Study Committee was published in revised form in January 2026. Kagoshima Prefecture, meanwhile, sets out in its “Amami Islands Promotion and Development Plan (FY2024–FY2028)” the development of high-quality facilities responsive to new tourism needs. Development that fills WS① and WS② aligns with the direction that the region’s own public plans explicitly call for.

The full sensitivity picture — across 25 rate-and-occupancy combinations, how far does Scenario B hold?

The previous section moved rate and occupancy one at a time, but what an investment decision actually asks is what happens when both move together. Taking the Scenario B formula (45 rooms, total investment ¥2.908bn, GOP margin 30%, total revenue = room revenue × 1.3) and substituting the same ranges used above — assumed room rate ±10% and assumed occupancy 60–70% — gives the 25 GOP yields tabulated below. Not a single new assumption has been introduced. The six cases from the previous section (base 6.44%; rate ±10% at 5.80%/7.09%; occupancy ±5pt at 5.95%/6.94%; both down at 5.35%) each match the corresponding cell in this table.

Nineteen of the 25 cells land at 6.0% or above, and even the worst does not fall below 5.35%. That means that even with rate and occupancy both at the bottom of the range, Scenario B’s yield does not drop below the high 5% level — there is resilience to swings in the revenue assumptions. Equally, the 7.63% where both land at the top is not an outstanding level for a remote-island resort development. The previous section’s point — that the range construction-cost estimating precision can move is wider than this table’s span (5.35%–7.63%, about 2.3 points) — holds just as well across all 25 combinations.

Even the pessimistic scenario has a simple payback of 18.7 years, about 5.6 years longer than the optimistic scenario’s 13.1. Whether that 5.6-year spread gets closed through construction cost — knowable before opening — or through rate and occupancy, knowable only after is the practical question in remote-island development.

Summary — five years on, the question is scale

Three points summarise this analysis.

First, demand has already been renewed. Visitor movements across the Amami Islands totalled 841,213 in 2024, recovering to 94.4% of the 2019 level, and visitors to Amami Oshima reached a record high of roughly 450,000 in 2025. Advertised prices have clearly stepped up too, +21.0% year on year in Tatsugo and +14.4% in Amami City. WS① and WS② are not empty for lack of demand.

Second, what is empty is not a price band but the intersection of price band and scale. The islands hold 72 properties advertised at ¥30,000 or above, but 83% of them have 1–4 rooms, and together they total only 357 rooms. Amami Oshima proper has not one property with 50+ rooms at ¥25,000 or above. On the same criteria, Miyakojima and Ishigaki — the comparable island-resort market — hold 4,700 rooms. Inventory that absorbs high-rate demand simply does not accumulate as room count: that is Amami’s structural signature.

Third, the new supply of the past five years did not fill this hole. Between 2021 and 2025, 85 properties were added but only 586 rooms; 341 of those rooms sit in two business hotels in Naze, and the remaining 83 properties average 3.0 rooms. Even with the powerful brand of World Natural Heritage status, the supply format did not shift from small and distributed. Which is precisely why, five years on, WS① and WS② remain vacant.

The 45-room midscale scenario at an assumed room rate of ¥45,000 delivers a 6.44% GOP yield even after construction-period inflation, and holds 5.35% in a conservative case where rate and occupancy both fall short. That assumed rate sits inside the band at which Nest at Amami Beach Villas and THE SCENE already sell. Not having to assume a price the market has never seen is the single most distinctive feature of the investment opportunity in the Amami Islands. The remaining question is not whether demand holds up, but how precisely remote-island construction cost can be controlled.

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