Oga Katagami Akita Offshore Wind (Round 2)
Located in the Sea of Japan off Oga Peninsula, Akita. Fixed-bottom monopile in ~20-40 m depth. Final deposits paid confirming Round 2 award.
Status
Advanced Developmentlifecycle stage
LikelyHafrok delivery likelihood
Ownership
OKOga Katagami Akita Offshore Green Energy LLC — 100% ◇
JNJERA Nex bp / JJ-Power / TETohoku Electric Power Co., Inc. / … ◆
Location
JapanSea of Japan (East Sea)
Technology
Capacity
315 MW ◆
Turbines
21 × 15 MW ◆
Model
Vestas V236 15-0 ◆
Foundation
Monopile ◆
Site & conditions
Site rights
Seabed rights held ∴
Origination
Japan Offshore Wind Round 2 (general sea-area public solicitation) · 2023 ·
Water depth
7–27 m ≈
Wind speed
7.6 m/s @ 150 m ≈
Revenue & grid
Offtake
Premium · 3 JPY_per_kWh ◆
Grid
Not recorded ◇
Connection
Akita Substation, Tohoku Electric Power grid ◇
Schedule
FID
Not taken
COD · announced
Jun 2028 ◆
COD · Hafrok
for registered readers
Delivery outlook modelled by Hafrok · calibrated on delivered projects
LikelyHafrok's delivery likelihood for Oga Katagami Akita Offshore Wind (Round 2)
The developer says Jun 2028. Hafrok's year sits later than that; the year, the chance and the working are for registered readers.
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Project timeline & ownership verified milestones on the spine · ownership from Hafrok's transactions record
1 dated milestone on the spine, each with its source · 2 recorded ownership deals from Hafrok's transactions record · the developer's announced-COD history
For registered readers · register below ↓
Revenue & offtake contract terms, price levels and the route to market
the contract terms on record · price over time in money of the day · the routes to market and the next visible round
For registered readers · register below ↓
Installation how the build is going · from sourced statements and Hafrok's registers
construction status and turbines standing · vessel and port contracts · the grid connection and whether it is ready in time
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Sources & verification
Rests on 20 sources (3 primary) · ◆ 13 documents held
◆Verified≈Modelled◇Sourced∴Inferred⌁Convention○Unverified∅No source·Derived
Numbers are stable citation ids — grouped by source class, so they are not consecutive.
Operator8
[7]
Oga Katagami Akita Offshore Green Energy LLC (project operator website)2024-02◆ Company Overview | Oga Katagami Akita Of…
“JERA Nex bp Japan GK … Electric Power Development Co., Ltd. … Tohoku Electric Power Co., Inc. … ITOCHU Corp. … Establishment Date: February 2, 2024”
supportsoperator↳ parents
[11]
Ministry of Economy, Trade and Industry (経済産業省)2024-12-06◆ 「秋田県男鹿市、潟上市及び秋田市沖」「新潟県村上市及び胎内市沖」「長崎県西海市江…
“経済産業省及び国土交通省は、再エネ海域利用法に基づく海洋再生可能エネルギー発電設備整備促進区域である「秋田県男鹿市、潟上市及び秋田市沖」、「新潟県村上市及び胎内市沖」及び「長崎県西海市江島沖」について、公募により選定された事業者から提出されたそれぞれの公募占用計画を認定しました。 [...] （2）認定をした日 2024年12月6日”
supportsConsentConsent applied
[12]
Ministry of Economy, Trade and Industry (経済産業省) / Oga Katagami Akita Offshore Green Energy LLC2024-12-06
“事業計画概要 供給価格 3.00円/ kWh 運転開始 2028年6月30日 風車機種 V236-15MW (Vestas製) 出力/ 基数 315MW / 21基”
supportsCommercial operationTurbinesModelUnit capacityTotal capacity+3 more
[13]
Oga Katagami Akita Offshore Green Energy LLC2026-07-01◆ 電気事業法に基づく技術基準の適合性確認証明書の受領について
“本件は、モノパイル基礎設計を担当する鹿島建設株式会社（協力会社：株式会社小堀鐸二研究所、コーウィー・エーエス）、風車・タワー設計を担当するベスタス・ジャパン株式会社およびMHIベスタスジャパン株式会社 [...] との緊密な連携のもと、設計および認証審査における一連のプロセス [...] を、計画的かつ綿密に遂行した結果、達成されたものです。”
supportsFoundation
[14]
Oga Katagami Akita Offshore Green Energy LLC2025-12-12◆ 再エネ海域利用法に基づく第３次保証金の納付について
“本保証金の納付は、洋上風力発電事業の確実な実施を担保するための重要な措置とされております。 ... 引き続き2028年6月の運転開始に向けて取り組んでまいります。”
supportsStatus note
[15]
Oga Katagami Akita Offshore Green Energy LLC2026-03-17◆ 住友電気工業株式会社との海底ケーブル工事に関する契約締結について
“当社は、3月16日に、住友電気工業株式会社との間で、秋田県男鹿市、潟上市及び秋田市沖洋上風力発電事業における海底送電ケーブルの設計や製造、敷設工事などに関する契約を締結しましたので、お知らせします。”
supportsStatus note
[16]
Oga Katagami Akita Offshore Green Energy LLC2026-05-13◆ 五洋建設株式会社との傭船契約の締結について
“2026年5月1日に ... 自己昇降式作業台船 ... 本事業の中核を担う洋上風車据付工事 ... 2028年6月の運転開始に向けて”
supportsStatus note
[18]
Oga Katagami Akita Offshore Green Energy LLC2026-09-07◆ JFEエンジニアリング株式会社によるモノパイル初出荷記念式典に参加しました（実施…
“国産初品の完成は本事業における重要な節目となります。”
supportsStatus note
OEM1
[5]
Vestas Wind Systems2024-12◆ Vestas wins 315 MW offshore order in Jap…
“Vestas has received a 315 MW order ... our first firm order for a project to be developed under the Japanese government's offshore wind auctions. ... 21 V236-15.0 MW ... Delivery of the turbines is ex…”
supportsTurbinesModelUnit capacityTotal capacity
Auction results1
[19]
Aquilo Energy / EEAS2026-06-22◆ jp-round2-2023-jp-tenders-study
Japanese offshore-wind tenders study: 30-yr occupancy permit, scheduled operation <=8 years after Occupancy Plan certification
supportsTender award · Japan Offshore Wind Round 2 (general sea-area public solicitation)
Record source1
[20]
DEME Group2026-05-29◆ deme-oga-katagami-akita-2026-05
Through its Japanese joint venture Japan Offshore Marine (JOM), DEME has secured a contract for the Oga-Katagami-Akita Offshore Wind Project. The contract covers the engineering works and vessel chart…
supportsVessel — turbine installation
Trade press8
[2]
Sustainable Japan2023-12-17◆ 【日本】経産省と国交省、洋上風力事業者選定ラウンド2結果発表。3区域とも最低価格…
“男鹿・潟上・秋田Offshore Green Energyコンソーシアム（JERA、電源開発、伊藤忠商事、東北電力）… 発電設備出力：31.5万kW（着床式/1.5万kW×21基/Vestas製）、運転開始時期：2028年6月（予定）”
supportsCommercial operationTotal capacity
[3]
Orrick, Herrington & Sutcliffe LLP2023-12
“all three applicants for the offshore areas of Oga City, Katagami City and Akita City bid at 3 yen/kWh … the FIP period is 20 years”
supportsMechanismDetail
[4]
Offshore Wind Biz2023-12-13
Press report — cited, not quoted; read it at the source link.
supportsTotal capacity
[6]
DeepWind (Japan offshore wind intelligence)2025-09-24◆ Akita Oga Katagami Akita City Offshore W…
“The project remains in the Environmental Impact Assessment phase, currently at the 'draft report' stage as of September 24, 2025. Construction Start: March 2026. Commercial Operation Date: June 2028.”
supportsConsentCommercial operationStatusConnection pointConsent applied
[8]
[9]
[10]
[17]
Baird Maritime (Reuters)2026-02-18◆ JERA presses ahead with offshore wind de…
Press report — cited, not quoted; read it at the source link.
supportsStatus note
Unverified import1
[1]
unknown
Press report — cited, not quoted; read it at the source link.
supportsTotal capacityWater depthCoordinates
Early access