Hafrok

Choshi Offshore Demonstration

Located 3km off Choshi, Chiba Prefecture. Also includes a met mast.

Status
Operationallifecycle stage
Ownership
TETEPCO — 50% ◇
NENEDO — 50% ◇
Location
Japan
Northwest Pacific
Verification
4/14 fields verified
12 sources
◆verified≈modelled◇sourced∴inferred·derived
open the source register →
Technology
Capacity 2.4 MW ◇ Turbines 1 × 2.4 MW ◆ Model Mitsubishi Mwt 2400 ◆
Foundation —
Site & conditions
Site rights Seabed rights held ∴ Water depth 16–30 m ≈ Wind speed 8.0 m/s @ 100 m ≈
Revenue & grid
Offtake FiT ◇ Grid Not recorded ◇ Connection Grid connection secured ◇
Schedule
FID 19 May 2010 ◆ COD 1 Jan 2019 ◆

Project timeline verified milestones only — each date carries its provenance mark

2010’11’12’13’14’15’16’17’18’19’20’21’22’23’24’25’26View the source for Final investment decisionFinal investment decision 19 May 2010 ◆View the source for Offshore constructionOffshore construction Dec 2010 ◆View the source for First powerFirst power Mar 2013 ◆View the source for Commercial operationCommercial operation 1 Jan 2019 ◆
Dashed tick marks today (9 Sep 2026).

Revenue & offtake the regime the project was built under

Offtake regime: Japan FIT (NEDO demo -> commercial FIT from Jan 2019)
RegimeJapan FIT (NEDO demo -> commercial FIT from Jan 2019) InstrumentFiT
A built project sells its power under the contract or support regime it was financed with; it is not expected to bid into new government offtake rounds. Where the record does not yet name that regime, the row says so rather than guessing.

Installation how the build is going · from satellite counts and Hafrok’s registers

Installation complete
not yet surveyed by satellite; the built farm can be, on request
Installation · on record
StageOperational
In operation since2019-01-01
Offshore construction2010-12 → 2019-01-01

Sources & verification

4/14 fields verified · rests on 12 sources (3 primary)
◆Verified≈Modelled◇Sourced∴Inferred⌁Convention○Unverified∅No source·Derived
Numbers are stable citation ids — grouped by source class, so they are not consecutive.
Operator4
[3]
TEPCO2019
supportsTotal capacity
source ↗
[6]
Kajima Corporation2013-02-27
“工期　　：　2010年12月～2013年1月”
supportsOffshore constructionSite rights
source ↗
[11]
NEDO2013
“the wind turbine for an offshore wind power system offshore of Choshi ... rotors are 92 meters in diameter ... 2400kW generator ... generation facility was started in January 2013”
supportsTurbinesModelUnit capacity
source ↗
[12]
Mitsubishi Heavy Industries Technical Review2011-09
“Table 1 Specifications of the MWT92/2.4: Rated output 2,400 kW; Rotor diameter 92 m”
supportsModelUnit capacity
source ↗
Trade press7
[2]
GEBCO Compilation Group2020
supportsWater depth
source ↗
[4]
4C Offshore2018
Press report — cited, not quoted; read it at the source link.
supportsoperatorownerMechanismDetailStatus+1 more
source ↗
[5]
The Wind Power2026
Press report — cited, not quoted; read it at the source link.
supportsCoordinates
source ↗
[7]
offshoreWIND.biz2013-03-04
Press report — cited, not quoted; read it at the source link.
supportsFirst power
source ↗
[8]
offshoreWIND.biz2019-01-09
Press report — cited, not quoted; read it at the source link.
supportsConsentCommercial operation
source ↗
[9]
Japan for Sustainability2010-05-19
“The Tokyo Electric Power Company, Inc. (TEPCO) announced on May 19, 2010, the start of its 'Experimental Study on Offshore Wind Power Generation Systems' in June 2010, in the Pacific Ocean off the sou…”
supportsFinal investment decision
source ↗
[10]
DTU Wind Energy / World Bank (Global Wind Atlas)2026
supportsMean wind speed
source ↗
Unverified import1
[1]
unknown
Press report — cited, not quoted; read it at the source link.
supportsTotal capacityWater depth
source ↗