Tokyo — the 23 special wards (特別区)
Japan's land register is open to anyone for a statutory fee — ¥140 shows the registered owner of one parcel or building, ¥330 the full register — but only one parcel at a time: there is no bulk owner file at any price, transaction prices are published anonymised to the chōme, and the towers of Marunouchi, Roppongi and Shinjuku are known to be Mitsubishi Estate's, Mori Building's, Mitsui Fudosan's and the J-REITs' because their own filings say so.
9 buildings · 9 with an owner established · 32 sources · 9 tier A · prepared 2026-10-06
Can you find out who owns it?
Real property registration (不動産登記) is run by the Ministry of Justice through its Legal Affairs Bureaus, and Article 119 of the Real Property Registration Act says that anyone (何人も) may, on paying the fee, request a certified extract of the register (登記事項証明書) — no reason, interest or identity is asked. The register records the parcel or building's physical description, every owner with the cause and date of acquisition, and mortgages. A certified extract costs ¥600 at the counter, ¥520 requested online and posted, ¥490 requested online and collected (fees from 1 April 2025); the uncertified online route, the 登記情報提供サービス, sells the owner particulars (所有者事項) of one parcel or building for ¥140 and the full register (全部事項) for ¥330, as a PDF, with a one-time credit-card ID and no registration. Searches are by lot number (地番) or building number (家屋番号), not street address, and strictly one at a time: no bulk owner dataset exists. Prices run the other way — MLIT's Real Estate Information Library publishes every reported transaction price with its area, use and quarter, but generalised to the chōme with no address and no party, and the annual 地価公示 land-price points are open data.
Is ownership public?Public, but one paid search at a time
Cost of one title search¥140 for the owner particulars (所有者事項) and ¥330 for the full register (全部事項) of one parcel or building via the 登記情報提供サービス (statutory fee + ¥10 association fee); a certified extract (登記事項証明書) ¥600 at the counter, ¥520 online request by post, ¥490 online request with counter collection (MOJ, from 1 April 2025)
Bulk ownership dataNone published
Sale pricesEvery sale, address generalised
Sites that forbid taking their data
- homes.co.jp — “利用者は、本サービス及び当社の運営するWebサイト・アプリに関するコンテンツ、サービス、ソフトウェア、著作物、有体物、情報その他一切につき、著作権法その他法令で認められている場合を除き、当社および権利者に無断で使用、複製、翻案、改変、翻訳、転載、配布、公開、公衆送信等、または譲渡、貸与、使用許諾その他一切の処分を行うことはできません。 (LIFULL HOME'S 利用規約: no use, copying, adaptation, reposting or distribution of the site's content without permission beyond what copyright law allows)”
- athome.co.jp — “第4条（禁止事項）…（５）本サイトのシステム等に過度な負荷をかける行為 …（７）通常の範囲でのWebブラウザによる使用以外での特殊なアクセス行為、その他本サイトの運営・提供若しくは他の利用者による本サイトの利用を妨害し、又はそれらに支障をきたす行為 (athome 利用規約 Art. 4: acts that overload the system, and any special access other than ordinary web-browser use, are prohibited); footer: このサイトに掲載している情報の無断転載を禁止します。”
- suumo.jp — “The 利用規約 page at /edit/kiyaku/ serves a 4.9 KB navigation shell with no clause text to a script, so nothing can be quoted; treated as prohibited and not used. The 不動産経済研究所 releases and TMG's housing-start statistics replace it.”
1
The marquee buildings
The towers that set the tone of the core, and who holds them. A price is the price a document states, on the date it states — not an estimate of what the building is worth now.
| Building | Use | Owner | Owner type | Last price paid |
|---|---|---|---|---|
| Marunouchi Building (丸の内ビル) 2-4-1 Marunouchi, Chiyoda-ku 159,907 m² total floor area; site 10,027 m² · 37 floors |
Mixed use | Mitsubishi Estate Co., Ltd. Mitsubishi Estate's securities report for the year to 31 March 2026, 主要な設備の状況 (b) 丸の内事業: 丸の内ビル, 東京都千代田区, 地上37階・地下4階, building 159,907 m², completed 2002, land 10,027 m²; book value land ¥73,228 million, building ¥28,871 million, other ¥1,037 million, total ¥103,138 million. The same table carries 新丸の内ビル (38 floors, 193,685 m², 2007, total ¥124,819 million), 丸の内オアゾ, 丸の内パークビル・三菱一号館, 丸の内永楽ビル and 丸の内二重橋ビル (¥122,818 million). The company's history: in 1937 it took over 丸ノ内ビル and its site from 三菱合資会社; the current building was rebuilt in 1999–2002. |
Public company | —A |
| Tokyo Midtown (東京ミッドタウン) 9-7-1 Akasaka, Minato-ku 281,901 m² (Mitsui Fudosan group's share-converted floor area); site 34,465 m² · 54 floors |
Mixed use | Mitsui Fudosan Co., Ltd. Mitsui Fudosan's securities report for the year to 31 March 2026, 主要な設備の状況: 東京ミッドタウン (東京都港区), オフィス・商業施設・住宅, 鉄骨造、一部鉄骨鉄筋コンクリート造, 地上54階・地下5階, completed January 2007, floor area 281,901 m² and land 34,465 m², both marked ※1 — 当社グループ持分換算面積, i.e. the group's share of a co-owned complex; book value building ¥40,250 million, land ¥148,163 million, other ¥1,785 million, total ¥190,200 million. The co-owners are not named in the filing. Tokyo Midtown Management Co., Ltd., a group company, operates it. |
Public company | —A |
| Roppongi Hills Mori Tower (六本木ヒルズ森タワー) 6-10-1 Roppongi, Minato-ku 379,408 m² total floor area; 238 m · 54 floors |
Mixed use | Mori Building Co., Ltd. Mori Building's FY2026/3 results report (May 2026), ポートフォリオ一覧（主要物件）: 六本木ヒルズ森タワー, 港区六本木, completed April 2003, 地上54階・地下6階, 延床面積 379,408 m². Mori's Roppongi Hills page: 'the main tower of Roppongi Hills, with 54 floors and a height of 238m'; the redevelopment, designated by the Tokyo Metropolitan Government in 1986, 'took the involvement of approximately 400 landowners and 17 years to complete'. Mori Building is unlisted; it files as a bond issuer and the report is its own portfolio statement, which lists 14 major buildings including ARK Mori Building (1986), Toranomon Hills Mori Tower (2014, 244,360 m²) and Toranomon Hills Station Tower (2023, 236,638 m²). |
Private company | —A |
| Azabudai Hills Mori JP Tower (麻布台ヒルズ森JPタワー) 1-3-1 Azabudai, Minato-ku 461,774 m² total floor area; approx. 330 m — Japan's tallest building · 64 floors |
Mixed use | Mori Building Co., Ltd. Mori Building's FY2026/3 results report, ポートフォリオ一覧（主要物件）: 麻布台ヒルズ森JPタワー, 港区麻布台, completed June 2023, 地上64階・地下5階, 延床面積 461,774 m²; the same report gives Azabudai Hills as a whole 区域面積 約8.1 ha, 延床面積 約861,700 m², office 約214,500 m², 約1,400 homes. Mori's project page: Mori JP Tower 64 floors, approx. 330 m; Residence A 54 floors (approx. 240 m); Residence B 64 floors (approx. 270 m, completed October 2025); construction started August 2019. The tower is a 市街地再開発 with other rights-holders; only Mori Building's own listing was opened, and no other owner's interest — including that implied by the 'JP' in the name — is asserted here. |
Private company | —A |
| Shibuya Scramble Square East Tower (渋谷スクランブルスクエア 第Ⅰ期 東棟) 2-24-12 Shibuya, Shibuya-ku 62,407 m² leasable area (Tokyu's filing) |
Mixed use | Tokyu Corporation Tokyu Corporation's securities report for the year to 31 March 2026, 主要な設備の状況〔提出会社〕: 渋谷スクランブルスクエア第Ⅰ期(東棟), 東京都渋谷区, 不動産賃貸設備, building book value ¥42,579 million, total ¥43,305 million; note ＊5: the land is a 仮換地 under the land-readjustment project so no land book value is shown, and 'building leasable area 62,407 m²'. Phase II (central and west towers) started construction in May 2025 for completion in FY2031. The operating company's own page lists its 出資者 as 東急（株）、東日本旅客鉄道（株）、東京地下鉄（株）; the interests of JR East and Tokyo Metro in the tower itself were not read from their filings, so only Tokyu is named and no stake is stated. |
Public company | —A |
| Tokyo Skytree (東京スカイツリー) and Tokyo Skytree Town 1-1-2 Oshiage, Sumida-ku 634 m broadcasting and observation tower; Skytree Town site 23,054 m² (Tobu Railway) |
Mixed use | Tobu Tower Skytree Co., Ltd. (東武タワースカイツリー株式会社), a wholly owned subsidiary of Tobu Railway Co., Ltd., which holds the Skytree Town land and buildings Tobu Railway's securities report for the year to 31 March 2026, 主要な設備の状況: under the parent's 不動産事業, 東京スカイツリータウン, 東京都墨田区, land 23,054 m² (plus 2,790 m² leased from outside the group) at book ¥14,345 million and buildings ¥30,062 million; under 連結子会社, 東武タワースカイツリー㈱, 東京都墨田区, buildings and structures ¥33,051 million and no land. The report describes 'the Tokyo Skytree operated by our wholly owned subsidiary' as a broadcasting tower and social infrastructure and lists 東武タワースカイツリー㈱ (capital ¥17,225 million, 100% held) as a 特定子会社. Skytree Town opened in May 2012. |
Public company | —A |
| Tokyo Tower (東京タワー) 4-2-8 Shibakoen, Minato-ku 333 m broadcasting tower with observation decks and the FootTown podium |
Mixed use | 株式会社TOKYO TOWER (TOKYO TOWER Co., Ltd.) The company's own outline: 社名 株式会社ＴＯＫＹＯ ＴＯＷＥＲ, 設立 昭和32年5月 (May 1957), 資本金 1億円, head office 東京都港区芝公園4丁目2番8号, 事業内容 総合電波塔の設置経営、観光施設の経営、不動産賃貸業 (establishment and operation of the general broadcasting tower, tourist facilities, property leasing), 85 employees at 31 March 2023. History: founded as 日本電波塔株式会社 in 1957, the tower opened in 1958; renamed 株式会社東京タワー in December 2018 and 株式会社TOKYO TOWER in October 2019. The company is unlisted and the page names no shareholder; no person is named here. |
Private company | —A |
| Tokyo Metropolitan Government Main Building No. 1 (東京都庁第一本庁舎) 2-8-1 Nishi-Shinjuku, Shinjuku-ku approx. 381,000 m² total floor area across the three TMG buildings; site approx. 42,940 m²; 243 m · 48 floors |
Civic | Tokyo Metropolitan Government (東京都) TMG Bureau of Finance page 'Tokyo Metropolitan Government Buildings': Main Building No. 1 '243 meters (797 ft) high with forty-eight stories above and three stories below ground'; Main Building No. 2 163 m, 34 storeys; the Assembly Building 41 m; address 2-8-1 Nishishinjuku; construction started April 1988, completed March 1991; site area approx. 42,940 m², building area approx. 27,500 m², total floor area approx. 381,000 m². The 45th-floor observatories are open to the public. |
Government | —A |
| Shinjuku Mitsui Building (新宿三井ビルディング) 2-1-1 Nishi-Shinjuku, Shinjuku-ku 102,718 m² total leasable area |
Office | Nippon Building Fund Inc. (日本ビルファンド投資法人) NBF's results deck dated 17 February 2026 (2025年12月期・第49期), 物件概要一覧（東京23区）: 新宿三井ビルディング, 総賃貸可能面積 102,718 m², 総賃貸面積 101,076 m², 期末稼働率 98.4%, 100 tenants; 物件価格一覧: 取得価格 ¥170,000 million, 期末簿価 ¥175,537 million, 鑑定評価額 ¥184,000 million at the 49th period-end (¥183,000 million a period earlier), direct-cap rate 3.0%. The deck's tenant table shows Mitsui Fudosan Co., Ltd. as NBF's largest tenant, 新宿三井ビルディング 他23物件, 573,235 m² or 47.0% of leased area. The acquisition date is not stated in the deck, so no acquisition row is recorded. NBF also holds 新宿三井ビルディング二号館 (¥16,285 million) and 西新宿三井ビルディング (¥45,392 million). |
REIT | —A |
2
The core land
The most valuable ground in the city, and what the public record says about it.
Tokyo's most valuable ground is measured by two public yardsticks and no roll: MLIT's 地価公示 (standard-lot prices at 1 January, open data) and the National Tax Agency's 路線価 (street-frontage values for inheritance tax). Neither is a parcel-level valuation — 固定資産税 assessed values are not public — and the one price register, MLIT's transaction data, is anonymised to the chōme. Both yardsticks put the peak on the Ginza 4-chome crossing, and both set records in 2026.
Highest 地価公示 price in Japan, 1 January 2026¥67,100,000 per m²
MLIT 令和8年地価公示: standard lot 中央5-22, 中央区銀座4丁目2番4 (住居表示 銀座4-5-6, 山野楽器銀座本店), up 10.9% on the year (8.6% a year earlier), the national top commercial point for the 20th consecutive year since 2007. The lot table: 454 m², 店舗, S8F2B, 高層の店舗事務所ビルが建ち並ぶ商業地域, 商業地域 (80/800). Published 17 March 2026.
Highest residential 地価公示 price, 1 January 2026¥7,110,000 per m²
MLIT 令和8年地価公示の概要: 港-4, 港区赤坂1丁目1424番1 (赤坂1-14-11), up 20.5% (10.3% a year earlier), the national top residential point for the ninth year since 2018. The largest Tokyo-area residential rise was 港-19, 港南3-7-23, ¥2,260,000 per m², +22.2%.
Average change in 地価公示 prices, Tokyo 23 wards, 2026Residential +9.0%, commercial +13.8%
MLIT 令和8年地価公示の概要, 都道府県別・主要都市別 tables: 東京23区 residential +9.0% (prior year +7.9%), commercial +13.8% (+11.8%); Tokyo-to as a whole +6.5% residential and +12.2% commercial; the Tokyo region +5.7% and +9.3%. Fifth consecutive year of rises nationally.
Highest 路線価 in Japan, 2026 (令和8年分)¥53,360,000 per m²
Tokyo Regional Taxation Bureau, 令和8年分 各税務署管内における最高路線価: 京橋署, 中央区銀座5丁目 銀座中央通り (鳩居堂前), 53,360 thousand yen per m², up 11.0% from 48,080 thousand in 2025. Other ward peaks: 新宿署 新宿区新宿3丁目 新宿通り 34,240; 麹町署 千代田区有楽町2丁目 晴海通り 27,520; 麻布署 港区北青山3丁目 表参道 22,080 (+11.3%). Rosenka is a tax value per street frontage, not a parcel valuation.
New condominium prices, Tokyo 23 wards, 2025Average ¥136.13 million; median ¥113.8 million
不動産経済研究所: 2025 首都圏 new condominium supply 21,962 units (−4.5%, the fewest since 1973), of which Tokyo 23 wards 8,064 (36.7%); 23-ward average price ¥136.13 million and ¥2.109 million per m² (+21.8% / +23.3%); the 23-ward median ¥113.8 million (+27.3%), above ¥100 million for the first time. The whole-region average was ¥91.82 million.
5
Who builds the houses
New-home building in this market: the volume, and the firms behind it. Ownership of a builder matters as much as its volume — a private-equity platform and a family firm behave differently.
Tokyo has no official builder league. The Tokyo Metropolitan Government publishes housing starts monthly from MLIT's 建築着工統計, and the private 不動産経済研究所 counts new condominium supply by developer group; the figures below are its 首都圏 (Tokyo, Kanagawa, Saitama, Chiba) counts for 2025, which is the closest thing to a ranking. The market is rental-led: of 122,130 units started in Tokyo in 2025 (−0.8%, a third straight fall), 67,356 were 貸家 (rental), 41,209 分譲 (for sale: 24,238 condominium flats and 16,257 detached houses) and 12,882 持家 (owner-built); the 23 wards took 93,239 starts (−5.3%) and the three central wards 5,442. Condominiums are built by the listed integrated developers; detached houses by builders such as Iida Group and Open House, whose detached-house counts were not sourced here.
| Name | Type | 首都圏 condo units supplied 2025 |
|---|---|---|
| Nomura Real Estate Development Co., Ltd. (野村不動産グループ) 不動産経済研究所 2025 売主グループ別供給戸数ランキング: 野村不動産G 3,190 units nationally, 首都圏 2,273 — '首都圏では2,273戸で供給トップとなった' (the largest supplier in the Tokyo region); 近畿圏 259, other 522, of which 136 on fixed-term leasehold. Listed parent Nomura Real Estate Holdings. |
Public company | 2,273 (首都圏); 3,190 nationally, #2A |
| Sumitomo Realty & Development Co., Ltd. (住友不動産グループ) Ranking: 住友不動産G 2,414 nationally, 首都圏 1,561, 近畿圏 393, other 313, 147 leasehold. Its own FY2025 fact sheet adds custom homes (注文住宅) delivered nationally: 8,343 units in the year to March 2026 (9,279 a year earlier), orders 8,345; the 決算短信 attributes the fall partly to the Building Standards Act amendment. |
Public company | 1,561 (首都圏); 2,414 nationally, #3A |
| Mitsui Fudosan Residential Co., Ltd. (三井不動産グループ) Ranking: 三井不動産G (三井不動産レジデンシャル) 2,350 nationally, 首都圏 1,381, 近畿圏 187, other 281, and 501 on fixed-term leasehold — the most leasehold units of any group. Wholly owned by listed Mitsui Fudosan. |
Public company | 1,381 (首都圏); 2,350 nationally, #4A |
| Iida Group Holdings (飯田グループ: 一建設, アーネストワン, タクトホーム, 東栄住宅, パラダイスリゾート) Ranking: 飯田グループ 1,373 condominium units nationally, 首都圏 1,111 — the group's main business is low-priced detached houses, which this condominium count does not include; its detached-house deliveries could not be read because ir.iidagroup.co.jp would not connect. |
Public company | 1,111 (首都圏); 1,373 nationally, #12A |
| Mitsubishi Estate Residence Co., Ltd. (三菱地所グループ) Ranking: 三菱地所G (三菱地所レジデンス) 1,549 nationally, 首都圏 1,012, 近畿圏 173, other 245, 119 leasehold. Mitsubishi Estate's FY2025 fact sheet: condominiums sold 1,764 units for ¥206,429 million (gross margin 37.1%), new supply 1,662 units, forecast 1,840 sales in FY2026 — group-wide, not Tokyo only. |
Public company | 1,012 (首都圏); 1,549 nationally, #11B |
| Open House Group Co., Ltd. (オープンハウスグループ: プレサンスコーポレーション, オープンハウス・ディベロップメント) Ranking: 'トップは6,597戸のオープンハウスグループ、5年連続のトップ' — 6,597 units nationally (Pressance Corporation 4,629, Open House Development 1,968), but only 712 in 首都圏 against 2,603 in 近畿圏 and 3,282 elsewhere; the national count includes investment studio flats outside 首都圏. The group's Tokyo detached-house sales, its original business, are not in this count. |
Public company | 712 (首都圏); 6,597 nationally, #1A |
6
Commercial landlords
The commercial side, counted separately from housing: who holds the office, retail and industrial floor area.
Tokyo's office market is owned by a handful of integrated developers whose securities reports (有価証券報告書) list their buildings with floor areas and book values, by one large unlisted developer that discloses as a bond issuer, and by J-REITs that publish acquisition prices and appraisals. The figures are in each source's own units and are not comparable: Mitsubishi Estate reports its Marunouchi floor space, Mori Building a building count and area, Sumitomo Realty and Mitsui Fudosan a leasing segment, and the REITs their portfolios.
| Name | Type | Holdings (as each source states) |
|---|---|---|
| Mitsubishi Estate Co., Ltd. (三菱地所) FY2025 fact sheet, Marunouchi Area Building Data (unconsolidated): operating floor space 2,762 thousand m², leasable area 1,658 thousand m², office vacancy 0.55%, building lease revenue ¥266,726 million; Marunouchi Property Business profit ¥97,534 million. The securities report's 丸の内事業 segment carries land of 204,452 m² at book ¥1,626,047 million and lists 丸の内ビル, 新丸の内ビル, 丸の内オアゾ, 大手町パークビル, TOKYO TORCH 常盤橋タワー and others; Torch Tower (B棟) is under construction. |
Public company | 2,762 thousand m² operating floor space in the Marunouchi area (31 March 2026)A |
| Mitsui Fudosan Co., Ltd. (三井不動産) Securities report for the year to 31 March 2026: 賃貸 segment revenue ¥936,601 million and business profit ¥177,011 million (forecast ¥940,000 million / ¥175,000 million). Its 主要な設備 table lists Tokyo Midtown (281,901 m², book ¥190,200 million), 汐留シティセンター, ゲートシティ大崎 and msb Tamachi; a second table lists major buildings it leases and sublets, led by 東京ミッドタウン八重洲 (131,383 m²), 赤坂Bizタワー (186,865 m²) and 飯田橋グラン・ブルーム (106,566 m²). It is also NBF's largest tenant. |
Public company | Leasing segment revenue ¥936,601 million, FY2025A |
| Mori Building Co., Ltd. (森ビル) Mori's office page: 'Our portfolio consists of approximately 100 buildings and 1.28 million m², mainly located in the Minato-ku area of Tokyo.' Its FY2026/3 results report lists 14 major buildings — ARK Mori Building (181,833 m²), Roppongi Hills Mori Tower (379,408 m²), Toranomon Hills Mori, Business, Residential and Station Towers, Azabudai Hills Mori JP Tower (461,774 m²), Omotesando Hills, Shanghai World Financial Center — and total assets of ¥2,818.3 billion at March 2026. Unlisted; the 六本木5丁目 project (approx. 1.08 million m², 66 floors) is with Sumitomo Realty. |
Private company | approx. 100 buildings, 1.28 million m², mainly Minato-kuB |
| Sumitomo Realty & Development Co., Ltd. (住友不動産) FY2025 fact sheet: leasing revenue ¥460,637 million, operating profit ¥210,181 million (45.6% margin), leasing-segment assets ¥4,715,674 million, cash flows from leasing ¥281,172 million, office vacancy 4.3%. The 決算短信 for the same year: '東京のオフィスビルを中心とする不動産賃貸事業が過去最高の大幅増益' and 'the company and some subsidiaries own leased office buildings and rental housing in Tokyo and other areas'. A building count is not stated in either document. |
Public company | Leasing segment assets ¥4,715,674 million (31 March 2026)A |
| Nippon Building Fund Inc. (日本ビルファンド投資法人) Results deck dated 17 February 2026 (2025年12月期・第49期): 70 properties at period-end, 1,584 tenants, total leasable area 1,239,418 m², average occupancy 98.5%; the 23-ward price table is led by 新宿三井ビルディング (acquisition ¥170,000 million, appraisal ¥184,000 million) and 飯田橋グラン・ブルーム (¥138,909 million, appraisal ¥154,000 million). Sponsor and largest tenant Mitsui Fudosan (47.0% of leased area across 24 properties). |
REIT | 70 properties, 1,239,418 m² leasable (31 December 2025)A |
| Japan Real Estate Investment Corporation (ジャパンリアルエステイト投資法人) JRE's portfolio list: central five wards (Chiyoda, Chuo, Minato, Shinjuku, Shibuya) 39 properties, ¥801,503 million acquisition price (67.5%); other 23-ward properties 9, ¥115,627 million; overall 77 properties, ¥1,188,040 million. Portfolio data page: appraisal value ¥1,447,290 million against book value ¥1,082,573 million at 31 March 2026. Sponsored by Mitsubishi Estate. |
REIT | 48 properties in the 23 wards, ¥917,130 million (77.2% of portfolio)A |
?
Looked for and not found
Claims this page would have made if a source could be opened. They are left out rather than guessed.
- The co-owners of Tokyo Midtown. Mitsui Fudosan's filing marks the complex's area as the group's share-converted figure (持分換算) and names no partner.
- The interests of East Japan Railway Company and Tokyo Metro in Shibuya Scramble Square's East Tower: the operating company lists them as shareholders, but their own filings were not opened, so only Tokyu's holding is recorded.
- Any Japan Post interest in Azabudai Hills Mori JP Tower, which the tower's name implies; no document opened states it.
- The date Nippon Building Fund acquired Shinjuku Mitsui Building: the deck states the ¥170,000 million acquisition price but not the date, and NBF's property pages 404 to scripts, so no acquisition row is recorded.
- Hulic's Tokyo holdings — its business page says it owns 'a large number of office and commercial buildings … mainly in Tokyo's 23 wards' but states no figure, and its company and IR pages 404; it is not listed as a landlord.
- Per-ward transaction counts and prices from MLIT's XIT001 API, which needs a free registered key that was not applied for; the library's terms forbid scraping the site.
- The 23-ward total of fixed-asset tax assessed values (固定資産の価格等の概要調書): the Tokyo Metropolitan Government's summary for FY2025 was not located, and per-parcel values are not public.
- Detached-house output by builder (Iida Group, Open House, Sekisui House, Daiwa House): no league exists, Iida's IR host would not connect, and the 不動産経済研究所 counts cover condominiums only.
- MLIT's 不動産価格指数 (hedonic price index): publication of the January 2026 onward indices is suspended for a calculation-program fault (notice of 28 September 2026, no new date), so no current index figure is given.
- Toranomon Hills Mori Tower (52 floors, 244,360 m²) and the other Mori Hills towers are in Mori Building's portfolio list but are not given their own marquee rows.
§
Sources
- 登記情報提供サービスとは — 料金について (Toki Joho Teikyo Service: what it provides, fee table) — 一般財団法人民事法務協会 (Minji Homu Kyokai) for the Ministry of Justice · paidA
- 登記手数料について (Registration fees, from 1 April 2025) — 法務省 Ministry of Justice · openA
- 不動産登記法 (Real Property Registration Act, Act No. 123 of 2004), Article 119 — e-Gov law data API — e-Gov 法令検索 / Ministry of Justice · openA
- 不動産情報ライブラリ 利用約款 (Real Estate Information Library — terms of use) — 国土交通省 MLIT · openA
- 不動産価格（取引価格・成約価格）情報取得API XIT001 (401 without a subscription key) — 国土交通省 MLIT · registrationA
- 令和8年地価公示の概要 (Summary of the 2026 Land Price Public Notice, March 2026) — 国土交通省 土地政策審議官部門 MLIT · openA
- 令和8年地価公示〈北海道・東北・関東・北陸・中部〉 standard-lot tables — 国土交通省土地鑑定委員会 MLIT Land Appraisal Committee · openA
- 令和8年分 東京国税局各税務署管内における最高路線価 (highest 2026 rosenka by tax office) — 東京国税局 Tokyo Regional Taxation Bureau, NTA · openA
- 住宅着工統計 令和7年12月・令和7年第4四半期・令和7年の新設住宅着工 (press release 6 Feb 2026) — 東京都住宅政策本部 Tokyo Metropolitan Government · openA
- 首都圏 新築分譲マンション市場動向 2025年のまとめ (26 Jan 2026) — 株式会社不動産経済研究所 Real Estate Economic Institute · openA
- 2025年 全国分譲マンション 売主グループ別供給戸数ランキング (25 Mar 2026) — 株式会社不動産経済研究所 Real Estate Economic Institute · openA
- 有価証券報告書 第127期 (FY ended 31 March 2026) — 主要な設備の状況 — 三菱地所株式会社 Mitsubishi Estate Co., Ltd. · openA
- Fact Sheet FY2025 (year ended March 31, 2026) — Marunouchi Area Building Data, Domestic Condominium Business Data — Mitsubishi Estate Co., Ltd. · openA
- 有価証券報告書 (FY ended 31 March 2026) — 主要な設備の状況 — 三井不動産株式会社 Mitsui Fudosan Co., Ltd. · openA
- 2026年3月期 通期決算報告 (FY2026/3 results report, May 2026) — ポートフォリオ一覧（主要物件） — 森ビル株式会社 Mori Building Co., Ltd. · openA
- Office — Our Businesses (portfolio scale statement) — Mori Building Co., Ltd. · openA
- Azabudai Hills — Developments — Mori Building Co., Ltd. · openA
- 有価証券報告書 (FY ended 31 March 2026) — 主要な設備の状況〔提出会社〕 — 東急株式会社 Tokyu Corporation · openA
- 渋谷スクランブルスクエアについて — 会社概要 (operating company outline) — 渋谷スクランブルスクエア株式会社 Shibuya Scramble Square Co., Ltd. · openA
- 有価証券報告書 第206期 (FY ended 31 March 2026) — 主要な設備の状況 — 東武鉄道株式会社 Tobu Railway Co., Ltd. · openA
- 会社概要 (company outline) — 株式会社TOKYO TOWER · openA
- Tokyo Metropolitan Government Buildings (details page, Bureau of Finance) — Tokyo Metropolitan Government · openA
- 決算説明会資料 2025年12月期（第49期）, 17 February 2026 (cover carries the prior period's label) — 物件概要一覧・物件価格一覧（東京23区） — 日本ビルファンド投資法人 Nippon Building Fund Inc. / 日本ビルファンドマネジメント株式会社 · openA
- Portfolio List (Portfolio Overview) — Japan Real Estate Investment Corporation · openA
- Portfolio Data — appraisal values as of March 31, 2026 — Japan Real Estate Investment Corporation · openA
- FACT SHEETS March 2026 (FY2025) — leasing segment, custom-home units — 住友不動産株式会社 Sumitomo Realty & Development Co., Ltd. · openA
- 2026年3月期 決算短信 (FY2025 results summary) — 住友不動産株式会社 Sumitomo Realty & Development Co., Ltd. · openA
- LIFULL HOME'S 利用規約 — 株式会社LIFULL · openA
- アットホーム 利用規約 — アットホーム株式会社 At Home Co., Ltd. · openA
- 不動産価格指数 (Real Estate Price Index) — publication-suspension notice of 28 September 2026 — 国土交通省 MLIT · openA
- Roppongi Hills — Developments — Mori Building Co., Ltd. · openA
- 首都圏マンション 戸当たり価格と専有面積の中央値の推移 (12 Feb 2026) — 株式会社不動産経済研究所 Real Estate Economic Institute · openA