Development of Offshore Wind Farm and Wind Measurement Method

Floating offshore wind farm demonstration project inFukushima was launched

Kashima Port,Kamisu, Ibaraki

Setana, Hokkaido
0.6MW×2

2MW×1

7MW×1

Kashima Port,
Kamisu, Ibaraki
2MW×7

Choshi, Chiba

Sakata, Yamagata
2MW×5

2.4MW×1

Offshore wind power demonstration projectin Choshi was launched

Enforcement of the Act on Promoting
the Utilization of Sea Areas for theDevelopment of Marine Renewable
Energy Power Generation Facilities.

(First case at offshore area)

0.1MW×1

Offshore wind power demonstration projectin Kita-kyushu was launched

Fixed-bottom type
Floating type※1

Next-generation floating offshore wind turbine demonstrationin Kita-kyushu was launched

303MW×1※2202029282027
20202625Oga, Katagami,Akita, Akita
15MW×21※2

Murakami,Tainai, Niigata
18MW×38

Kitakyushu, Fukuoka

Enoshima,Saikai, Nagasaki
15MW×28

Expected to start commercial operation in 2025

Floating LiDAR System(around 2015 -)Floating type
Offshore Wind Turbine

30

29202028
20272026
20252024202220

2120202023

The market for offshore wind power has grown dramatically inrecent years, and one of the factors of this growth has been driven
by the advancement in wind measurement technology. Accurate
wind measurement is essential to reliably assess the economic
viability and safety of wind farm projects. On the other hand, thecost of installing offshore metmast is enormous. Therefore, shifting
to a low-cost wind measurement is also an important perspective.
Over time, the locations of windfarm have expanded from onshore
to offshore, and then to deep-water areas. Along with this trend,
wind measurement methods have shifted from direct measurement(metmast) to indirect measurement (Doppler LiDAR).
This infographic visualizes the history of offshore wind power andthe evolution of measurement equipment in Japan.

20191820

172020
1615

1420

20
13

Laser beams from coast to sea
area and measures offshore
wind conditions within a few
kilometers from coast. Observation
by multiple units enables
measurement of turbulence andother fine-scale phenomena.

12Wind Measurement Evolution

Vertical LiDAR is installed ona floating structure offshore
to measure wind directions
overhead. Measurements
can be taken offshore wherescanning LiDAR cannot reach.

20

Fixed-bottom type
Offshore Wind Turbine

2010092020200720200605
2004
2008

Measures wind by irradiating
laser beams in the sky.
With the increasing size ofwind turbine, it has been
installed to measure windat high height that cannot
be reached by metmast. Inprinciple, the measurement
is carried out in conjunction
with metmast.

2003

02
20

2MW×1

(around 2013 -)Onshore Wind Turbine

01

20

Kitakyushu Port(Hibikinada), Fukuoka
9.6MW×25

Scanning LiDAR(around 2009-)

Tower facilities tomeasure wind speed
and direction. The
height is limited to60m by domestic
regulations, but due
to deregulation in2022, it has been
partially allowed tobe taller than 60m
but less than 90m.

20Happo,Noshiro, Akita
15MW×25

2MW×1

20

Vertical LiDAR(around 1990-)

R2

Goto, Nagasaki
2.1MW×8

Nyuzen, Toyama
3MW×3

Choshi, Chiba
12.6MW×31

Indirect Measurement (remote sensing device)11

Onshore Metmast

Kashima Port,
Kamisu, Ibaraki
8MW×19(First case as a floating typeat commercial scale) ※1

Installed in 2013, launched commercial operation in 2016

20Direct Measurement

Noshiro, Mitane,Oga, Akita
12.6MW×38
Yurihonjo, Akita
12.6MW×65

Noshiro Port, Akita
4.2MW×20

Kitakyushu, Fukuoka

00

24

Akita Port,Akita
4.2MW×13“Vision for Offshore Wind Power
Industry" was announced at the
2nd public-private council.

2MW×8

Offshore wind power demonstration projectin Goto was launched

Measurement Method

20205MW×1

R1Ishikari Bay New Port,
Hokkaido
8MW×14

Fukushima

Goto, Nagasaki

20

23

22
20

21

20
20

20

20

19

18
20

17
20

16
20

15
20

14
20

20

20

20

1211

13

1020092008
202007

06
2005
2004
20032002

The first installment
in Japan

2001
2020

History of Offshore Wind Power in Japan00in Japan

This infographic is based on Rera Tech Inc.’s own research and may have slight differences in information such as actual capacity, year, etc.
Please refer to the information of each project for details, such as for the year of when the project started and the starting year of operation. Please note that the size of the installed turbine sizes may not be accurate.