On September 30, 2026, Sogo Jutaku (a group company of Dai-ichi Life Marubeni Real Estate) announced a silent-partnership (TK) equity investment in an apartment-hotel development at 14-18 Kanayamacho, Naka Ward, Hiroshima. The project combines 34 rooms in an existing five-storey RC office building converted to hotel use with a new 20-room, five-storey steel-frame wing on the adjacent former mechanical car park — 54 rooms and 3,366.74m² of gross floor area in total. In the same Kanayamacho district, on Aioi-dori, Marubeni Urban Development and Tokyu Land will break ground on a 20-storey, 286-room hotel in November 2026. This article breaks down the “conversion wing + new-build wing” structure on a single site in terms of construction cost and floor use, and reads how the market will absorb these two projects (340 rooms) from the room stock and opening pipeline within a 1km radius of the site, 24 months of estimated settled ADR in Naka Ward, and booking curves.

Executive Summary — The Two Kanayamacho Projects’ 340 Rooms Add +3.1% to Stock Within 1km; the 54 Rooms Alone Add +0.5%

The conclusion first. The 340 rooms the two Kanayamacho projects bring are +3.1% on the 10,857 rooms (106 properties, 2026) of stock within a 1km radius of the site; the 54 rooms Sogo Jutaku invested in amount to only +0.5%. Stock within 1km grew from 6,861 rooms in 2012 to 10,857 in 2026, +58% in 14 years, so the market has already absorbed supply of around +3% a year on average. Even if both Kanayamacho projects open at the same time, they stay within the supply pace this catchment has already experienced.

The two projects, however, are very different. The Sogo Jutaku project is an apartment type, with 73.9m² of gross floor area per room in the existing wing and 42.6m² in the new wing — devoting the floor area of two to three Naka Ward business-hotel rooms (22–38m² per room on a building-plan basis) to a single room. The 286-room project is a full-spec hotel at 48.2m² per room. Naka Ward’s estimated settled ADR was ¥12,274 (N=64) in August 2026, -4.8% from ¥12,890 a year earlier, and the trailing 12-month average (September 2025–August 2026) was ¥10,046 (N=56–64). This is an investment made while rate growth has paused, and the conversion wing’s success depends on whether it can turn floor area into rates from multi-night and group demand.

The Two Projects — 54 Rooms (34 Converted + 20 New) and a 20-Storey, 286-Room Hotel on Aioi-dori

First, the primary sources. According to Sogo Jutaku’s release (September 30, 2026), a godo kaisha acquired trust beneficiary rights to the existing office building and the adjacent land on September 30, 2026, and Sogo Jutaku made a TK investment on the 29th. Marubeni Asset Management is the asset manager. The investment amount and opening date are not stated in the release, and this article does not estimate them. For the 286-room project, AND BUILD HIROSHIMA posted a building-plan notice and the Chugoku Shimbun reported an outline in May 2026: construction starts in November 2026, completion is scheduled for December 2028, and the target opening is late 2028 to early 2029.

The figure that stands out is the difference in floor area per room. The existing wing is 73.9m², suggesting a layout that keeps the office floor heights and column spans and allocates large rooms. The new wing, at 42.6m², is also above the Naka Ward business-hotel level (see below). The 286-room project in the same district is 48.2m², close to a standard 20-storey full-spec hotel including lobby, restaurant, banquet and meeting space. In other words, one is an “apartment type that uses floor area generously” and the other a “hotel that gains scale through room count”; even within Kanayamacho, the demand they target does not overlap.

Why “Conversion Wing + New-Build Wing”? — Estimated Construction Cost per Room: ¥13.42M for Conversion, ¥31.01M for New Build

The rationale for combining conversion and new build on one site shows up in the construction-cost arithmetic. An office-to-hotel conversion keeps the existing structure, so there is no cost for the frame and foundations; the work centres on interiors, building services and fire-compartment upgrades. Our earlier articles on the office-conversion break-even ADR and the feasibility conditions for change of use set renovation costs in a range of ¥400k–800k per tsubo, with ¥600k as the base. For new builds, a published compilation of building-starts statistics (archi-book 2026 edition, 2025 data) puts steel frame at ¥2.405M per tsubo, the highest by structure, and national hotel construction costs have risen for two consecutive years since 2024 to a record level.

Applying these unit costs to the Kanayamacho floor areas, renovating the existing wing’s 2,514.21m² (761 tsubo) at ¥600k per tsubo costs ¥456M, or ¥13.42M per room. The new wing’s 852.53m² (258 tsubo) at ¥2.405M per tsubo for steel frame costs ¥620M, or ¥31.01M per room. If all 54 rooms were newly built at the new wing’s floor efficiency (42.6m²/room), about 2,302m² and ¥1.675B would be needed — ¥31.01M per room. The combination of conversion and new build (¥1.077B in total construction cost, ¥19.94M per room) is about 36% below an all-new build, and the existing-wing rooms are large at 74m². Acquisition prices for the land and existing building are undisclosed, so only construction costs are compared here. The three-tier structure of new-build cost per room (limited-service, city and upscale) is laid out, together with feasible ADRs for 12 markets, in Hotel Construction Cost ¥8.7M–71.4M per Room.

The combination also makes sense for the schedule. The existing wing involves no demolition, so it can move straight from the building confirmation application (change of use) to interior works. The new wing is limited to part of the site (the former mechanical car park) and can be built in parallel with the existing-wing works. Our building-plan database contains a new-build plan at 14-13 Kanayamacho — steel frame, 5 storeys, 852m² GFA, 20 rooms — registered with scheduled completion in October 2027, which appears to correspond to the new wing. However, the release does not disclose an opening date, and this article does not treat this registered value as the opening date.

Nationally, non-new-build supply is rising. In our analysis of the non-new-build share, which broke down 5,707 construction starts, 16.7% of hotel supply was extensions or reconstructions. Conversions (changes of use), however, rarely appear as either new builds or reconstructions in building-starts statistics, so those counting supply need to be aware that rooms are added to the market without showing up in the statistics.

Room Stock and Pipeline Within 1km — 11 Registered Plans, 1,936+ Rooms, Against 10,857 Rooms

Now to measure the market’s capacity to absorb. A 1km radius around 14-18 Kanayamacho reaches Matobacho and Matsubaracho on the south-exit side of Hiroshima Station to the east, includes Hatchobori to the west (stopping short of Kamiyacho), and extends south past Heiwa-Odori (Peace Boulevard). Room stock in this catchment rose from 6,861 rooms (68 properties) in 2012 to 10,857 rooms (106 properties) in 2026. It grew by 1,637 rooms over the three years 2018–2020 (about 550 a year), was almost flat in 2021–2024, and increased again in 2025–2026. The two Kanayamacho projects’ 340 rooms equal the increase in 2019 alone (+339 rooms).

Now overlay the opening pipeline. The table below lists plans in the same 1km radius from our building-plan database with completion or opening scheduled from October 2026 onward, excluding duplicates on the same site. The 10 plans with known room counts total 1,936 rooms, +17.8% on current stock. The two Kanayamacho projects account for 306 of these rooms, or 16% of the whole pipeline.

The pipeline is unevenly distributed. Large properties line up on the south-exit side of Hiroshima Station (Matobacho and Matsubaracho) at 301, 316, 201 and 180 rooms, joined by 168 rooms on the Heiwa-Odori side, 286 and 20 rooms in Kanayamacho, and 46 rooms in Hatchobori. The “Hatchobori vs. Hiroshima Station” pattern described in our analysis of Hiroshima’s two-pole hotel supply still holds once the two Kanayamacho projects are added. If anything, the arrival of a converted apartment hotel in Kanayamacho, which sits between the two, means more capacity that does not overlap in room type with the large business and city-hotel supply.

Naka Ward Estimated Settled ADR Over 24 Months — ¥12,274 in Aug 2026 (N=64), -4.8% YoY

Next, the price level of the demand being absorbed, traced over 24 months (October 2024–September 2026) of Naka Ward’s estimated settled ADR. In the confirmed months (through August 2026), 2025 showed large seasonal swings — peaking at ¥12,890 in August, then ¥12,550 in November and ¥7,593 the following January — and 2026 ran at ¥11,147 in May and ¥12,274 in August. Year on year, June was -13.1%, July +0.3% and August -4.8%, so summer rates are at or slightly below last year’s level. The trailing 12-month average is ¥10,046 (N=56–64).

September 2026 is ¥11,471 (an estimate from current listing levels, N=62), and listing levels are rising toward the autumn travel season at ¥14,076 for October and ¥14,012 for November. These cannot be compared on the same basis as confirmed months, so the chart shows only September, as a separate point.

The trailing 12-month average is around ¥10,000 for business hotels and around ¥15,000 for city hotels, so Naka Ward rates differ by roughly 1.5× by category. When an apartment-type conversion wing sells 74m² rooms, the comparison is not one business-hotel room but the price of “two business-hotel rooms” (in the ¥20,000s for two guests in two rooms), and whether family and group multi-night demand comes on top of that decides whether the required ADR discussed below is achievable. Note that the property count on the listed-price basis shows a step in June 2026 due to a nationwide expansion of the sample, so please do not read changes in property counts as changes in demand or supply.

Booking Curve LT45→1 — Naka Ward Rises From 65.9% at 45 Days Out to 90.8% at the Last Minute; Business Hotels 91.4%

The depth of demand can be measured by how inventory is absorbed toward the check-in date. For stay dates in September 2026, lining up occupancy (OTA-listed inventory basis, estimated) from LT45 to LT1 for all properties in Naka Ward (59 properties / 5,256 rooms, based on listings on major booking sites) and business hotels (32 properties / 4,517 rooms), all properties go from 65.9% at 45 days out to 71.3% at 30 days, 80.4% at 14 days, 84.6% at 7 days and 90.8% at the last minute — building about 10pt in the final two weeks. Business hotels go from 65.4% at 45 days to 91.4% at the last minute, on almost the same trajectory as all properties. August (all properties: 57 properties / 5,168 rooms) is not much different, at 64.8% at 45 days and 89.6% at the last minute.

This curve has two implications. First, a third of inventory is still unsold at 45 days out — a market that fills at the last minute. Business travel and weekend leisure and event demand arrive at short lead times, consistent with the shape shown in our fixed-point analysis of Hiroshima booking curves. Second, the multi-night and group demand an apartment type targets tends to book further ahead, so it brings “rooms that sell early” into a last-minute market. Situations in which the 54 rooms compete with inventory that remains unsold until the last minute will be limited.

As a pointer to multi-night and group demand, consider guest reviews in Naka Ward. In NLP analysis of the past 24 months of reviews by the HotelBank Editorial Team, the Naka Ward property with the most mentions of “multi-night / long stay” has a mention rate of 3.6% (N=110 reviews), and for “trips with friends / groups” the figure is 0.9% (N=32) — both small shares of the total (Source: HotelBank Editorial Team research, NLP analysis). The existing Naka Ward market offers little capacity for multi-night and group stays, and 74m² rooms step into this gap.

Room Count × Estimated ADR Positioning — 8 Properties in the 20–60-Room Band, Median ¥9,415; the 54-Room Project Falls in This Band

Plotting existing properties within 1km by room count and estimated settled ADR (trailing 12-month average) reveals the market structure. The median for the 48 properties (8,338 rooms) with observed prices is ¥11,180; the 25 properties with more than 150 rooms have a median of ¥11,502, and the 8 properties in the 20–60-room band ¥9,415. The small band mixes limited-service hotels at ¥6,000–9,700 with design-led and upper business hotels at ¥15,700–24,200, with few properties in between at ¥10,000–15,000. The 54-room conversion wing + new wing sits in this band and aims to capture rates for “two to four guests per room.”

Full-service properties line the upper right of the scatter plot. Hilton Hiroshima (420 rooms, opened 2022) is the highest, followed by Hotel Granvia Hiroshima South Gate and ANA Crowne Plaza Hiroshima. Large limited-service hotels near the station cluster at the lower right, with rates of ¥8,000–12,000. In scale, the 286-room Kanayamacho project falls into the group on the right, and its rate will be set by the positioning of whichever brand operator SHR Hotels deploys. The 54-room project is in the small band on the left and differentiates itself from existing small properties by room size.

Location: 97,794 Workers and 34,000 Residents Within 1km — On the Boundary Between Business District and Nightlife

Kanayamacho lies on the boundary between the Hatchobori/Ebisucho commercial area, the Nagarekawa/Yagenbori nightlife district, and the business district toward Hiroshima Station. Aggregating the Economic Census (2021 Activity Survey) by 2020 Census small areas, a 1km radius of 14-18 Kanayamacho contains 8,568 establishments and 97,794 workers, of whom 25,263 (25.8%) work in office-type industries (information and communications, finance and insurance, real estate, professional and technical services, and other services). Weekday business-travel demand underpins rates, consistent with the last-minute booking curve of business hotels.

For resident population, the 250m-mesh future estimates in National Land Numerical Information show 34,000 people living in the 48 meshes within 1km in 2020, an estimated 34,391 in 2025 and 33,812 in 2040 (-0.6% vs 2020) — essentially flat. The working-age share is 67.0% and the elderly share 22.6%, a catchment where city-centre living continues. Resident population is the night-time population on a census basis, not the staying or transient population.

On the map, meshes with dense resident populations lie south (Yagenbori, Tanakacho) and northeast (Noboricho, Kaminoboricho) of Kanayamacho, while Kanayamacho itself is dominated by business and commercial floor space. A remaining night-time population around the hotel is a condition for restaurants and shops to stay open into the evening, and a premise for multi-night guests spending time in the neighbourhood.

Zoning, Floor Area Ratio and Flood Risk — Both Sites Commercial, FAR 500% and 900%, Flood Depth 3–5m in the Maximum Assumed Scenario

Both sites are in commercial districts, with no restriction on hotel use. The FAR is 500% for the 54-room project’s site and 900% for the 286-room project on Aioi-dori, and this difference translates directly into the difference between five and twenty storeys. The 54-room project, which converts an existing building, does not need to use up its floor area allowance; the focus of design is how to lay out the existing floors.

Flood risk is a shared item to check. The city centre on the Ota River delta falls within the 3.0m to under 5.0m inundation-depth zone in the maximum assumed flood, which applies not only to these two sites but to many commercial areas around Hatchobori, Kamiyacho and Hiroshima Station. From a BCP perspective — placement of the ground-floor reception and plant rooms, and the floor where emergency power is installed — how to use the existing wing’s ground floor becomes a design item in the conversion plan. Land prices continue to rise in the city-centre commercial area: +9.1% YoY at the Yayoicho standard site, +8.5% at Ebisucho, and +6.1% at the Noboricho benchmark site.

Development Scenario Estimate — Required ADR on a Construction-Cost Basis Is ¥13,100–16,000, Below Two Naka Ward Business-Hotel Rooms

Because the investment amount and acquisition price are undisclosed, this simple estimate uses only assumptions that can be set from public information. Land is taken at a reference value of ¥526M — the nearest official land price (3-1 Yayoicho, ¥505,000/m²) multiplied by the 1,041.57m² site — and the acquisition price of the existing building is set at zero (actual transaction prices differ from official land prices and the existing building also carries a price, so the required ADR would be higher than this). Construction costs are the renovation cost of ¥400k, ¥600k and ¥800k per tsubo described above plus ¥2.405M per tsubo for the steel-frame new build; expected yields of 4.5–5.5%, occupancy of 80% (full year, an assumption for the estimate), an NOI margin of 35% (assuming lean apartment-type operations), 54 rooms and 365 days a year.

In the base case (5.0% yield, renovation at ¥600k per tsubo) the required ADR is ¥14,500, 1.44× the Naka Ward all-category trailing 12-month average of ¥10,046 and 1.47× the business-hotel average of ¥9,843. Per room it is above the market, but existing-wing rooms are 74m², with the floor area of two to three business-hotel rooms. Compared with business-hotel prices of around ¥20,000 for two guests in two rooms, ¥14,500 per room looks good value for families and groups, and there is ample room for an apartment type to capture this band. Factoring inflation into the new-wing construction cost to mid-2027 (+5.3% for 2026 and half of +5.0% for 2027) gives ¥2.596M per tsubo and ¥669M, raising the base-case required ADR by about ¥500 to ¥15,000.

Sensitivity is driven more by the acquisition price of the land and existing building than by renovation costs. A ¥200k-per-tsubo change in renovation cost moves the required ADR by only about ¥1,400, but if the acquisition price is 1.5× the official land price, the required ADR rises by about ¥2,400. For investors in conversions, the condition to watch most closely is the entry point — the price at which the existing building was bought — the same structure we showed for bank-branch conversions. This article sets land at the official land price, but actual commercial-land transactions range widely, from a median of 0.86× to 1.19× (top quartile) of the official price; which data to use for the land unit price is tested in our comparison of commercial-land transaction prices with official land prices (394 deals, 10 markets).

Comparison With Other Cities — A Required ADR of ¥14,500 Matches the Hakata Ward Average, and Is 1.5–1.8× in Chugoku and Shikoku Prefectural Capitals

To check how demanding the base-case required ADR of ¥14,500 is, we set it against the estimated settled ADR of major western Japan cities and wards. On a trailing 12-month average (September 2025–August 2026), against Naka Ward’s ¥10,046, Hakata Ward in Fukuoka is ¥14,314 — a ratio to the required ADR of 1.01×, almost the same level. Meanwhile Minami Ward in Hiroshima (the south-exit side of Hiroshima Station) is ¥9,412, a ratio of 1.54×; Kita Ward in Okayama, Kokurakita Ward in Kitakyushu and Takamatsu are ¥7,900–8,300, at 1.76–1.83×; and Matsuyama is 1.46×. Naka Ward is on the higher side among Chugoku and Shikoku prefectural capitals, but does not reach Hakata Ward’s level.

What this comparison shows is that ¥14,500 per room is “high for Hiroshima, but average for Kyushu’s largest business and leisure market.” If the 54-room project sells its 74m² rooms to two to four guests, the per-guest price is below Naka Ward business hotels. Whether rate upside is judged at the Hakata Ward level or at the level of Minami Ward on the south-exit side of Hiroshima Station makes a big difference to how hard the base case is to achieve.

Checkpoints for Investors and Building Owners — Supply Concentration, Paused Rate Growth, Flood Risk

Conclusion — Combining Conversion and New Build on One Site Makes Sense for Both Floor Area and Construction Cost

Although the two Kanayamacho projects are moving in the same district at the same time, they mean different things as supply. The 286-room project brings +2.6% to stock within 1km through scale; the 54-room project adds only +0.5%, but with floor areas of 74m² and 43m² per room it creates capacity for multi-night and group stays that is thin in the existing market. Combining a conversion wing and a new-build wing costs about 36% less than an all-new build on a construction-cost basis, shortens the schedule through parallel works, and turns the floor height of the existing structure directly into room size.

On the absorption side, the 10,857 rooms within 1km have absorbed +58% supply over 14 years, and Naka Ward’s estimated settled ADR is at a point where growth has paused: a trailing 12-month average of ¥10,046 and -4.8% YoY in August. The base-case required ADR of ¥14,500 is 1.44× the market average, but less than two business-hotel rooms. For providers of development equity, the return on a conversion is set by the entry acquisition price rather than construction cost; for building owners, this project shows that even a five-storey office that does not use up its floor area allowance can become hotel floor space if it has the floor height and location.

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