Building an offshore wind farm means workers are tied to the same port for years. For regional business hotels, that points to a kind of demand quite different from tourism: extended, long-term, weekday-centric stays. In this article, we use MetroEngines Research data to measure the lodging stock within 10km and 30km of each of the seven base ports designated by Japan’s Ministry of Land, Infrastructure, Transport and Tourism (MLIT), and quantify, as a range, how much extended-stay demand from construction workers each area can absorb.

Seven Base Ports — Reading the Pipeline After the Round 1 Reshuffle

The number of “base ports” (officially, bases for offshore renewable energy power generation facilities), which serve as construction hubs for offshore wind, rose to seven when Aomori Port and Sakata Port were added on April 26, 2024. They joined Akita, Noshiro, Kashima, Kitakyushu, and Niigata ports. Separately, MLIT materials list Wakkanai, Ishikari Bay New Port, Mutsu-Ogawara, and Omaezaki as ports with offshore wind plans, but these have not been designated as base ports.

One premise needs to be clarified first. For the sea area off Noshiro City, Mitane Town, and Oga City, which prompted this article, the developer, the Mitsubishi Corporation group, announced on August 27, 2025, following a reassessment of project viability, that it would withdraw from three sea areas including this one. The original schedule of starting construction in March 2026 is therefore no longer valid. For the two sea areas off Akita Prefecture, re-tendering during FY2026 has so far only been set out as a policy. Noshiro Port therefore cannot be treated as “a port where construction starts in 2026.”

Round 2 and Round 3 projects, on the other hand, have more concrete schedules. In terms of base-port activity, these form the real pipeline.

Promotion zone	Capacity	Selected developer	Base port	Planned start of operation
Off Oga, Katagami & Akita cities, Akita	315 MW	Oga Katagami Akita Offshore Green Energy (JERA, J-Power, Itochu, Tohoku Electric)	Akita Port (O&M at Funakawa Port)	June 2028
Off Happo Town & Noshiro City, Akita	375 MW	Happo Noshiro Offshore Wind (ENEOS Renewable Energy, Iberdrola, Tohoku Electric)	Akita Port, Muroran Port	June 2029 (onshore construction start postponed, date TBD)
Off Murakami & Tainai cities, Niigata	684 MW	Murakami Tainai Offshore Wind (Mitsui & Co., RWE, Osaka Gas)	Niigata Port	Offshore works moved to April 2028; operation start under review
Off Enoshima, Saikai City, Nagasaki	420 MW	Mirai Enoshima (Sumitomo Corporation et al.)	Kitakyushu Port, among others	August 2029
Aomori Sea of Japan (South)	615 MW	Tsugaru Offshore Energy consortium (JERA, Green Power Investment, Tohoku Electric)	Aomori Port	June 2030
Off Yuza Town, Yamagata	450 MW	Yamagata Yuza Offshore Wind (Marubeni, Kansai Electric, Tokyo Gas, Marutaka, BP Iota Holdings)	Sakata Port	June 2030 (onshore works Nov 2027; Sakata Port use from Apr 2028)
Off Noshiro, Mitane & Oga / off Yurihonjo, Akita; off Choshi, Chiba	—	Developer announced withdrawal in August 2025	Noshiro, Akita, Kashima ports	Re-tendering during FY2026 set out as policy

Source: Compiled by HotelBank Editorial Team from MLIT and METI releases, developer disclosures, and Noshiro City materials (as of September 2026)

The key point is that every one of these schedules can change. The Happo–Noshiro project postponed the start of onshore construction, citing rising material costs, and the Murakami–Tainai project switched turbines from 38 units of 18 MW to 46 units in the 15 MW class and pushed the start of offshore works back by a year. Hoteliers using these projects for investment decisions should not pin “when demand arrives” to a single date; reading it as a range is more realistic.

Offshore Crews Sleep on Ships — Hotel Demand Comes From Land-Side Work

This is the biggest structural difference between offshore wind and construction projects such as data centers or semiconductor fabs. Offshore wind construction and maintenance use dedicated vessels that let workers stay at sea for long periods. SOVs (service operation vessels) offer hotel-like accommodation, designed for crews of dozens to hundreds of people to stay for extended periods with private cabins, mess halls, and recreation facilities. CTVs (crew transfer vessels) carry around 10–20 people to the site. In other words, a large share of the workforce in the turbine installation and subsea cable phases does not stay in onshore hotels.

The demand hoteliers can realistically capture should therefore be limited to the “land-side” work below.

Construction phase	Main work	Onshore lodging demand	Nature of stay
Onshore transmission & substation works	Surveying, excavation, substation construction, onshore cable laying	Large	Extended stays of months to years, mainly weekdays
Marshalling & pre-assembly at base port	Receiving, temporary storage, and pre-assembly of components	Large	Extended stays close to the port; vehicle use assumed
Offshore foundations, cables & turbine installation	Offshore work by SEP vessels and cable-laying vessels	Limited	Mainly at sea; onshore stays for crew rotation and standby
Management, supervision, inspection & developer visits	Site supervision, regulatory consultations, site tours	Moderate	Repeated short stays; relatively higher rate tolerance
O&M after start of operation	Periodic inspections, parts replacement	Small to moderate	Steady demand over 20+ years, around the O&M port

Source: Organized by HotelBank Editorial Team based on developer and MLIT publications

This structure differs from the premises of our earlier analyses of lodging demand from data center construction (364–725 rooms per 50MW) and ADR trends around a semiconductor cluster. The method (project size → required workforce → required rooms → measured local stock) is the same, but for offshore wind an extra step subtracts the workers who stay at sea. Ignore this difference and scale rooms directly from project size, and demand will be significantly overestimated.

Measuring Lodging Stock at the 7 Base Ports — From 387 to 10,015 Rooms Within 10km

We extracted lodging facilities within 10km and 30km of each port’s coordinates and totaled their registered rooms. The results differ by orders of magnitude from port to port.

Source: MetroEngines Research; compiled by HotelBank Editorial Team (N=7 ports; 1,482 facilities in total counted within 30km, including overlaps)

Base port	10km facilities	10km rooms	30km facilities	30km rooms	Of which business-type	Median rooms	100+ rooms
Noshiro Port	40	981	69	1,477	676	14	2
Sakata Port	39	1,656	183	4,714	2,625	14	15
Kashima Port	101	3,616	328	7,642	3,512	15	17
Akita Port	82	5,345	132	6,194	4,665	17	25
Aomori Port	70	5,060	184	7,014	5,080	15	26
Niigata Port (East District)	20	387	228	11,275	9,038	20	36
Kitakyushu Port (Hibikinada)	131	10,015	358	17,533	13,166	24	57

Source: MetroEngines Research; compiled by HotelBank Editorial Team (radius around each port’s coordinates. Median rooms and 100+ room counts cover only facilities with known room counts)

The seven ports fall roughly into three tiers. Kitakyushu and Niigata (East District) are urban ports with more than 10,000 rooms within 30km, where construction demand is small enough to be absorbed by existing stock. Akita, Aomori, and Kashima form a middle tier with 6,000–7,600 rooms within 30km. And Noshiro has just 1,477 rooms within 30km, of which 676 are business-type — an order of magnitude thinner than the other ports. Within 10km, Niigata (East District) has the fewest rooms at 387, but that is because the East District is an industrial port away from central Niigata; widen the radius to 30km and Niigata City’s 10,000+ rooms come into range. Noshiro is different in that it has no such larger city behind it.

Source: MetroEngines Research; compiled by HotelBank Editorial Team. Circle size corresponds to rooms within 30km

Estimating Required Rooms — With Every Assumption Disclosed

At the time of our research, we could not find any developer that publishes the “number of workers staying onshore at peak” for an offshore wind project. What follows is therefore an estimate based on our own assumptions, not a confirmed demand forecast. We disclose the assumptions in a table so readers can substitute their own values.

Two public reference points are available. First, the Vision for Offshore Wind Power Industry (1st edition, December 15, 2020, Public-Private Council on Enhancement of Industrial Competitiveness for Offshore Wind Power Generation) sets a 2040 installation target of 30–45 GW, with industry aiming to train and secure about 40,000 offshore wind workers by 2040. Dividing mechanically, this works out to about 8.9–13.3 workers per 10 MW (40,000 ÷ 30–45 GW) across the whole industry, including manufacturing, construction, and O&M. Second, Fukui Prefecture’s estimate for the project off Awara City (350 MW, 30-year project period) puts job creation over the full lifecycle at 9,330 over 30 years (about 310 per year), of which 6,880 (about 230 per year) are within the prefecture. The estimate is based on a survey of 214 companies in the prefecture and interviews with 13 developers.

Both figures cover the whole industry or the whole lifecycle; the number who are on site at construction peak and stay in hotels is smaller still. In this article, we therefore vary the number of workers staying onshore at peak between 100 and 400, and set the hotel capture rate (the share staying in hotels rather than company dormitories, leased apartments, monthly rentals, etc.) at 30–60% to derive required rooms. Because long-term worker stays are generally one person per room, we use a conversion factor of 1.0 room per person.

Workers staying onshore at peak (assumption)	Hotel capture 30%	45%	60%
100	30 rooms	45 rooms	60 rooms
200	60 rooms	90 rooms	120 rooms
300 (mid case in this article)	90 rooms	135 rooms	180 rooms
400	120 rooms	180 rooms	240 rooms

This table is an estimate by HotelBank Editorial Team based on assumptions. Conversion factor 1.0 room per person. Actual room needs will vary with the schedule, construction setup, and local housing availability

Setting these room requirements against each port’s business-type room stock within 30km reveals clear differences in “absorption headroom.” In the mid case of 135 rooms, the demand equals just 1.0% of existing business-type stock at Kitakyushu and 1.5% at Niigata (East District), and would be almost entirely absorbed by existing hotels. At Noshiro, it equals 20.0%.

Source: MetroEngines Research; compiled by HotelBank Editorial Team. Mid case of 135 rooms as a share of business-type room stock within 30km

Base port	Business-type rooms within 30km	Low: 45 rooms	Mid: 135 rooms	High: 240 rooms
Noshiro Port	676	6.7%	20.0%	35.5%
Sakata Port	2,625	1.7%	5.1%	9.1%
Kashima Port	3,512	1.3%	3.8%	6.8%
Akita Port	4,665	1.0%	2.9%	5.1%
Aomori Port	5,080	0.9%	2.7%	4.7%
Niigata Port (East District)	9,038	0.5%	1.5%	2.7%
Kitakyushu Port (Hibikinada)	13,166	0.3%	1.0%	1.8%

Source: MetroEngines Research; compiled by HotelBank Editorial Team. Required rooms are estimates based on the assumptions above

Within 30km of Noshiro, only 2 properties have more than 100 rooms, and the median property has 14. In this market, the mid case of 135 rooms means “demand close to one large business hotel landing on a fragmented existing stock.” Put the other way, for an operator that can reliably supply a block of extended-stay rooms, there is still open ground in both price point and occupancy.

Port-City Rates Are Already Moving — Noshiro Up 19.9% YoY

This demand is not purely in the future. The offshore wind farms inside the port areas (13 turbines at Akita Port and 20 at Noshiro Port, about 140 MW in total) began commercial operation between December 2022 and January 2023, and business travel by related companies is already established. Media reports note that, with rising business use related to offshore wind and other projects, hotels around Noshiro City are frequently close to fully booked.

According to MetroEngines Research’s estimated settled ADR, Noshiro City was about ¥7,600 in August 2026, up 19.9% YoY (N=7 properties). In the same month, Akita City was about ¥10,300 (+18.8%, N=30), Sakata City about ¥7,300 (+15.9%, N=15), Aomori City about ¥17,600 (+11.5%, N=39), and Kamisu City, home to Kashima Port, about ¥6,200 (+8.8%, N=21).

Source: MetroEngines Research; compiled by HotelBank Editorial Team (Noshiro City, estimated settled ADR. N=5–7 properties)

Source: MetroEngines Research; compiled by HotelBank Editorial Team (August 2026, YoY change in estimated settled ADR)

Noshiro’s sample of N=7 properties reflects how small the market is. A few properties can move the city-wide level, so monthly swings are relatively large. Even so, the step up from about ¥6,300 in September 2024 to about ¥7,600 in August 2026 is hard to explain as a one-off monthly fluctuation. Read alongside segment-level ADR trends across Akita Prefecture, it suggests that business demand is pushing up rates within the prefecture as well.

Checking Extended-Stay Readiness Through Guest Reviews — Parking and Breakfast Established, Laundry Has Room to Grow

In practice, three things decide whether a hotel wins extended-stay demand from construction workers: parking, breakfast, and coin laundry. Workers drive to the site; with early mornings and late nights, being able to eat on-site is valuable; and for stays of several weeks to months, laundry access strongly affects comfort.

We analyzed guest reviews for major properties in Noshiro, Akita, and Sakata to see how often each element is mentioned. Note that the mention rate is not a rating score but “the share of reviews in which the element came up.”

Property	Reviews analyzed	Parking	Breakfast buffet	Coin laundry	Long stay
Hotel Route-Inn Noshiro (ホテルルートイン能代)	238	13.9%	8.4%	—	3.8%
Hotel New Green Noshiro (ホテルニューグリーン能代)	98	13.3%	—	11.2%	—
Hotel Minami, Noshiro (ホテルミナミ)	96	13.5%	7.3%	—	—
Hotel Alpha-One Akita (ホテル・アルファ-ワン秋田)	726	13.1%	3.3%	—	2.8%
Hotel Inn Sakata (ホテル イン 酒田)	333	11.1%	12.3%	3.9%	5.1%
Hotel Alpha-One Sakata (ホテル・アルファ-ワン酒田)	354	11.9%	4.0%	—	—
Hotel Route-Inn Sakata (ホテルルートイン酒田)	230	9.1%	3.5%	—	2.2%

Source: HotelBank Editorial Team research (NLP analysis of guest reviews, most recent 24 months). “—” means the mention rate did not reach the reporting threshold; it does not mean the facility is absent

The results are clear. Parking has high mention rates of 9–14% at all seven properties, making it an established evaluation criterion in this market. Breakfast also features prominently at 7–12% in Noshiro and Sakata. By contrast, coin laundry comes up as a review topic at only 2 of the 7 properties. For stays of several weeks or more, laundry can be a real deciding factor, so this is an area with room for differentiation. Mentions in a long-stay context are also only 2–5%, suggesting this need has not yet been fully articulated.

For hotels targeting extended-stay demand, clearly stating — in plan names and property information — washing and drying facilities, microwaves and hot water, handling of work clothes, and early check-out, on top of the parking and breakfast existing properties already do well, translates directly into being chosen at booking. The supply of “worker lodging” in central Hokkaido is a useful reference as an early example of this design approach in practice.

New Supply Is Limited — Price Bands Remain Open

How is supply responding to this demand outlook? New openings tracked by MetroEngines Research (based on confirmed OTA listings) show that opening volumes in the prefectures with base ports are small.

Prefecture	2024 openings / rooms	2025 openings / rooms	2026 openings / rooms	Plans (building permit applications)
Akita	16 / 294	11 / 711	4 / 168	0
Aomori	7 / 164	18 / 566	5 / 363	0
Yamagata	10 / 203	13 / 248	7 / 188	0
Niigata	31 / 278	18 / 251	15 / 585	0
Ibaraki	25 / 561	18 / 884	14 / 209	1 / 197 rooms

Source: MetroEngines Research & Consulting (based on confirmed OTA listings) / MLIT “Statistical Survey on Building Starts.” *OTA listings appear several months before opening, so figures for recent and upcoming months may rise as more listings appear. *The plans column is based on building permit applications as of the survey date; counts and rooms are expected to rise as more applications are filed, so treat it as a lower bound on the confirmed pipeline at present

In Akita, Aomori, and Yamagata, no plans based on building permit applications can be identified at present. This does not mean “no supply will come”; permit applications are typically filed 1–2 years before opening, so the pipeline visible today is thin. Actual openings in 2024–2026 also show small project sizes: Akita had 31 openings with 1,173 rooms over three years, and Yamagata 30 openings with 639 rooms.

There is some individual movement. In Noshiro City, the mayor told the city council in September 2024 that an out-of-prefecture company was planning a 4-story, 74-room business hotel on the site of a building on city-owned land in front of JR Noshiro Station, with a target opening in 2026. Against the mid case of 135 rooms, 74 rooms would absorb just over half in a single building. Put differently, some headroom would still remain.

Conclusion — Each Port Calls for a Different Strategy

Measuring the lodging stock around the seven base ports shows that positioning for offshore wind construction demand falls into three types.

First, urban ports such as Kitakyushu and Niigata (East District). With more than 10,000 rooms within 30km, mid-case demand is only 1.0–1.5% of existing stock. The winning play here is not new supply but for existing hotels to become the ones chosen, through extended-stay plans and in-house amenities.

Second, the middle tier: Akita, Aomori, and Kashima. With 6,000–7,600 rooms within 30km, absorption headroom is 2.7–3.8%. Rates are already rising (Akita City +18.8%, Aomori City +11.5%, Kamisu City +8.8%), and construction demand will add on top of existing business demand. The key question is how to allocate between locking in blocks of extended-stay rooms on long-term contracts and protecting rates for general demand.

Third, ports with no larger city behind them, such as Noshiro. 1,477 rooms within 30km, 676 of them business-type, a median of 14 rooms per property, and only 2 properties over 100 rooms. The mid case of 135 rooms equals 20.0% of existing business-type stock, reaching 35.5% in the high case. Estimated settled ADR rose 19.9% YoY, the fastest among the cities around the seven ports, and the price band is still open. For operators able to supply extended-stay-ready rooms at scale, this is a clear upside.

That said, schedules at every port remain fluid. The three Round 1 sea areas are at the re-tendering stage, and even Round 2 projects have seen schedule revisions from postponed onshore works and turbine changes. For lodging investment, rather than “build because offshore wind is coming,” it is more realistic to design around a base load of existing business, site-visit, and O&M demand, with the construction peak layered on top as upside. O&M demand after the start of operation is steady and lasts more than 20 years, making it the more stable foundation for a business plan.

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