OSW Project areas & Transmission Lines Map (beta version)

OSW Project Areas & Transmission Lines Map
User’s Guide
Updated on June 6, 2023

Renewable Energy InstituteContentsThis manual shows✓ how to work the OSW Project Areas & Transmission Lines Map, and✓ the detailed explanation of the data on the Map.

Access to the Map ……………………………2p
Home page instructions………………………3p
Data viewing and sources……………………4p■ Data update frequency
Updating approximately every two months for OSW Development Areas and regularly for Transmission Lines.
■ Disclaimer
While we have used our reasonable efforts to ensure the latest accurate information available on the Map, however, Renewable
Energy Institute is not responsible for its accuracy. The data released by other entities may be revised retroactively, and thedata on the Map may be revised accordingly.
■ Citation
You can use the downloaded figures and data freely. However, when citing, please use the credit notation in the following form:[Example]
Source: Renewable Energy Institute, “OSW Project Areas & Transmission Lines Map (beta version) accessed on DDMMYYYY".
1

1 Access to the Map
Two ways to access:(1) “Renewable Energy Institute” Top page ＞ Statistics ＞ Offshore Wind Map(2) URL into the search bar https://www.renewable-ei.org/statistics/offshoremap/?page=en

2

2 Home page instructionsShow All：
All items are shown
Hide All：
All items are hidden

Check box：
to show the items

Zoom in/out：“＋” to zoom in“ー” to zoom outHome：
to return to the default
location of the map

Language：to select Japanese/English

Search：to search a keyword
on the map

Background map
design：to select a base map
Topographic map⇔ OpenStreetMap

Project Status：
to download informationof project / EIA areas

33 Data viewing and sources

1.

OSW Project Areas………………………… 5p

2.

EIA Areas…………………………………… 7p

3.

Transmission Lines and Substations……7p

4.

Ports………………………………………… 12p

5.

Fishery Rights …………………………… 13p

6.

Distance from Shore/Water Depth…… 14p

7.

Other information ……………………… 15p

4

3-1 OSW Project Areas
OSW project status is shown in six colors.
Information of each project is popped up by selecting the icon near the project area (not the figure).
（Icons）

Fully
CommissionedWind farm is in operation

Under
Development

The operator has already been determined and the projectis under development (including under construction andpartly commissioned)

Promotion Zone

Designated as Promotion Zones under RE Sea Area
Utilization Act
Designated as Promising Zones under the operation of RE
Sea Area Utilization Act

Promising Zone

Preparation Zone

（Icons are on the nearshore of assumed sea areas. Sea area
information is displayed when it is publicly available in thematerials of the Councils held based on the Act or other publicdocuments)

Designated as Preparation Zone under the operation of RESea Area Utilization Act（Icons are on the nearshore of assumed sea areas.)

OthersInclude demonstrative project related to OSW by thegovernment, or decommissioned wind farms, among others* The location and shape of the figures of areas are reference information created by Renewable
Energy Institute based on information published by the government and operators. Pleaserefer to the documents as below for official information including position coordinate data.
・Promotion Zone: Guidelines for Tender or Public notice of zone designation
・Promising Zone: Materials of the Councils held based on the Act・Port Area: Ministry of Land, Infrastructure, Transport and Tourism, “RE Utilization area
inside Port areas”
53-1 OSW Project Areas
Information shown is as below:* Data sets are prepared by Renewable Energy Institute based on public information
issued by Ministry of Economy, Trade and Industry and Agency for Natural Resourcesand Energy regarding tender results and database of Certification of Renewable
Energy Power Generation Business Plan, or available information on operators’
websites.

Items

Contents

Prefecture

Name of prefecture

Name of zone/windfarm

Name of zone or wind farm

Sea area

Category of sea area

Framework forzoning

Name of acts based on which zone is designatedStatusCurrent project status

Operator

Name of operator(s)（consortium participants orinvestors in parenthesis)

Capacity（MW）

Capacity of wind farm

Operation startTime of operation startPrice (JPY/kWh）

Procurement price (under FiT scheme) or FiP Price(Benchmark price for calculating the premium)

FiT/FiP

Scheme category related to price

FiT/FiP period end

Time of End of period for procurement or grant ofpremium

URL

Related URLUpdate

Date of data update

63-2 EIA Areas
It shows the areas where EIA process has been conducted.
Multiple cases in the vicinity of area are compiled in one figure.
Information shown is as below:
Items

ContentsPrefecture

Name of prefecture

Area nameName of area (named by REI)

Operator

Name of Operator(s) conducting EIA (consortium
participants or investors in parenthesis)

Capacity（MW）

Capacity of wind farm based on EIA information

UpdateDate of data update* The above data sets are prepared by Renewable Energy Institute based on“Environment Assessment Database System” (EADAS) and “Information of EIA
cases” database operated by Ministry of Environment. Please refer to these for
information on individual cases (only in Japanese).
* The location and shape of figures are reference information created by Renewable
Energy Institute based on information displayed on EADAS by being compiled
with multiple EIA cases in the vicinity. Please refer to EADAS for official
information including position coordinate data.
* Information on the operators are prepared by Renewable Energy Institute basedon EADAS and “Information of EIA cases” database, as well as operators’
websites. Changes due to business succession, company name changes, etc.,
may not be reflected.
* Capacity is based on “Information of EIA cases” and may differ from the capacityof the project that has subsequently been in progress.
* Information related to decommissioned wind farms and EIA cases of non-selected
operators in Promotion Zone after tender completed are not included.

7

3-3 Transmission Lines / Substations
Information on transmission lines and substations operated by power transmission companies and generaltransmission and distribution companies (TSOs) is shown. AC transmission lines are color-coded by four voltage
classes (500kV, 220-275kV, 100-187kV, 66-77kV), and substations are indicated by black ●. DC transmissionlines are represented by dashed lines.
*Transmission lines with a voltage of less than 66 kV are not listed due to difficulty in locating them. Transmission lines with avoltage of 66 kV or higher are not listed if it is difficult to locate them.

500kV / DC

AC 500kV and DC transmission line

220-275kV

AC 220kV to 275kV transmission line

100-187kV

AC 100kV to 187kV transmission line

66-77kV

AC 66kV to 77kV transmission line

Substation

All substations* The above data is compiled by Renewable Energy Institute based on transmission line maps andavailable capacity information published by TSOs. Therefore, transmission lines and substations
owned by companies other than TSOs may not be listed.
* For details of individual transmission lines and substations, please refer to the publicly available
information of TSOs.
* The location information of transmission lines and substations is based on maps published by theGeospatial Information Authority of Japan (GSI), but accuracy cannot be guaranteed.
* The latest information may not be updated for transmission lines and substations that have been
newly constructed, expanded, or demolished.

83-3 Transmission Lines / Substations
The voltages operated by Japanese transmission operators and general transmission and distribution companies
differ for each operator. For reference, the transmission line voltages for each area are written below.
66-77kV

100-187kV

220-275kV

500kV

Hokkaido

66kV

100kV,110kV,187kV

275kV

N/A

Tohoku

66kV

154kV

275kV

500kV

Tokyo

66kV

154kV

275kV

500kV

Chubu

77kV

154kV

275kV

500kV

Hokuriku

66kV,77kV

154kV

275kV

500kV

Kansai

77kV

154kV

275kV

500kV

Chugoku

66kV

110kV

220kV

500kV

Shikoku

66kV

110kV,187kV

N/A

500kV

Kyushu

66kV

110kV

220kV

500kV

Okinawa

66kV

132kV

N/A

N/A
93-3 Transmission Lines / Substations
Selecting any transmission line will display detailed information about that line. The information listed is as below:* The data set in the table was prepared by Renewable Energy Institutebased on available capacity information and other information releasedby TSOs.

Items

Contents

Line No.

Transmission line number set by the area TSO

Line NameTransmission line name set by the area TSO

Voltage

Operating voltage of the transmission line

Number of lines

Number of lines of the transmission line

Capacity of lines (MW)Maximum facility capacity of the transmission line

Operating capacity (MW)Maximum operating capacity of the transmission line

Operating constraint factor

Factors governing the operational capacity of thetransmission line

Available capacity (MW)Capacity available of the transmission line

Available capacity considering
upper-level voltage facilities(MW)

Capacity available, considering the substations and theupper voltage level power grid connected to thetransmission line

Available capacity with N-1
Inter-Trip scheme (MW)Capacity available that can be connected if the power
plant accepts the N-1 Inter-Trip scheme

Possibility of curtailment undernormal conditions

If the power plant accepts the non-firm connection,
whether a curtailment will occur under normalconditions.

Data updated

Date of data update103-3 Transmission Lines / Substations
Selecting any substation will display detailed information about that substation. The information listed is as below:
Items

Contents

Substation No.

Substation number set by the area TSO

Substation nameSubstation name set by the area TSO

Voltage (Primary side) (kV)Primary side voltage of the substation

Voltage (Secondary side) (kV)Secondary side voltage of the substation

Number of transformers

Number of transformers installed in the substation

Capacity of substation（MW）

Maximum facility capacity that can be transformed at
the substation

Operating capacity (MW)Maximum operating capacity that can be transformed at
the substation

Operating constraint factor

Factors governing the operational capacity of thesubstation

Available capacity (MW)Capacity available of the substation

Available capacity considering
upper-level voltage facilities(MW)

Capacity available, considering the upper voltage level
power grid connected to the substation

Available capacity with N-1
Inter-Trip scheme

Capacity available that can be connected if the power
plant accepts the N-1 Inter-Trip scheme

Possibility of curtailment undernormal conditions

If the power plant accepts the non-firm connection,
whether a curtailment will occur under normalconditions

Data updated

Date of data update* The above information was prepared by Renewable Energy Institute based on available
capacity information and other information released by TSOs.

11

3-4 Ports
It shows the location and category of ports.
Information displayed is as below:

Items

Contents

Port type

Category of ports- Strategic international hub porta port serving as the hub of an international ocean freighttransportation network for long-distance international ocean
freight shipping, having advanced functions to connect theinternational ocean freight transportation network and thedomestic ocean freight transportation network- International hub port
a port other than strategic international hub ports, serving as
the hub of the international ocean freight transportation
network- Major port
a port other than strategic international hub ports orinternational hub ports, serving as the hub of a maritime
transportation network or having a great bearing on thenational interests- Regional port
a port other than strategic international hub ports,international hub ports, or major ports- Port under Article 56
a port for which the governor of the relevant prefecture
designates the water area under the Article 56 of the Port andHarbor Act- Others

Port nameName of port

Port management
body

Name of port management body

* The data set above is based on the information provided through the website“MDA Situational Indication Linkages” operated by Japan Coast Guard.

12

3-5 Fishery Rights
It shows the location and type of the area where fishery rights are set.
Information displayed is as below:Items

ContentsPrefecture

Name of prefecture

Type

Category of fishery rights set in the area
・Common fishery right
Right to engage in fishing by jointly using thefishing grounds for shell fishing, seaweed
harvesting, etc. by local fishermen(Duration: 10 years)

・Demarcated fishery right
Right to operate an aquaculture business in acertain area (duration: 5 or 10 years)

・Fixed gear fishery right
Right to operate a large-size fixed gear set (setwith a depth of 27m or more in principle), etc.
(Duration: 5 years)*Small fixed gear is positioned as a common
fishing right, etc.

* The fishery right system is a system whereby a person obtains the rightto operate a specific fishery exclusively on a certain water surface underlicense from the prefectural governor.
* The data set above is based on the information provided through thewebsite “MDA Situational Indication Linkages” operated by Japan Coast
Guard.

13

3-6 Distance from Shore / Water Depth
Distance from shore and water depth are shown as below:* The lines are distance information automatically generated from thecoastline of the base map.

* The information above is created by Renewable Energy Institute basedon the contour information provided through the website “MDA
Situational Indication Linkages” operated by Japan Coast Guard.

14

3-7 Other information
Click the map icon at the bottom left corner to change the base map (Topographic map or OpenStreetMap).
Information of OSW projects and EIA areas on the map is available from “Project Status” in the widget.

Topographic map(default)

OpenStreetMap

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OSW Project Areas & Transmission Lines Map User Guide
Updated June 6, 2023
Renewable Energy Instituteinfo@renewable-ei.org
www.renewable-ei.org