100th Anniversary Topics

History of its TechnicalFounding - 1960s

1970s

VehicleCommunication
Equipment
Business 1957〜
Car Antenna(Pillar Type）

Rod Antenna

100years

Evolution and Business/Product Development
1980s

The rod antenna for transistor
radios, hit products at that time,
was what propelled Yokowo
Manufacturing Co., Ltd. to theforefront. Yokowoʼs high-quality
antennas with their smooth
extendibility based upon precisionpipe processing technologies
garnered recognition fromelectronics manufacturers. In thisway, antenna technologies becamea core business for the Company.

AM/FMMotor Antenna

Extension
Cable A'ssy

Motor Operated Conner Pole

Microwave Components
1983〜

Outdoor Unit
for BS

Low Noise Block Down Converter

1956〜2003

Rod Antenna

PersonalCommunication
Antenna

Sporting Goods
1959〜1995

Golf Goods

PipeDrawing
Technology
Spring Bar,FounderʼsInvention

Metal Bats

Microwave Technology
Antenna Technology

Full-scale introduction ofmicrowave technologies at thelaunch of satellite broadcast
services. Since then, Yokowo has
deployed microwave equipment
for satellite broadcasting
and VSAT, and it is now animportant core technology
in the Companyʼs VCCS andCTC business, with significant
contributions to supporting 5G
throughout its product line-up.

Golf Shafts

Micro Precision Processing Technology

Precision
PipeProcessing
Technology

As the founder of Yokowo Manufacturing Co., Ltd., the predecessor of YOKOWO CO.,LTD., Chutaro Yokoo (1894 to 1977) refined his skills as a craftsman producing precisionpipes used in pocket watch hinges. When wristwatches entered the mainstream, heinvented the spring bar. This is a belt-attachment component comprising a spring
inserted into an ultra-thin pipe, so it can expand at both ends. This landmark invention
became widely adopted overseas, capturing the worldʼs largest market share. This was
the starting point of “technical Yokowo” that exists to this day.

Spring bar craftsmanship transformed
into advanced, world-classtechnologies. These advanced, micro
precision processing technologies bringunique, original products that only
Yokowo can provide, and these arebearing fruit in diverse fields such as
semiconductor inspection, connectors
for electronic devices, and advanced
medical equipment.

Everything Started with Pipes
After having finished his apprenticeship in 1922, Chutaro Yokoo decided to go out on
his own and start a business, opening the Seirinsha bicycle shop the next year. This wasdestroyed on the day of opening by the Great Kanto Earthquake, but reopened just one
month later.
In 1926, using the skills he had acquired over 15 years as a craftsman, he opened aprecision pipe processing factory in Mukojima, Tokyo.
Thus was born Yokowo Manufacturing Co., Ltd., the predecessor of YOKOWO CO., LTD.

05

Metal Bats for
SoftballIn the midst of the leisure boom
during the period of high economic
growth, Yokowo took advantageof our pipe technologies to begin
manufacturing and selling golf
clubs and shafts. The Company hasalso expanded into metal bats andshafts for rackets.

Yokowo 2022 Integrated Report

Circuit Testing
Connector Business
1979〜

Specifications required for probes
and sockets for semiconductor
testing are becoming more
and more exacting, due to theminiaturization and increased
performance of semiconductors.
Yokowo started its circuit
testing connector businessin 1979, providing the world
with semiconductor testing jigs
developed using microwave
technology, in addition to its
world-class micro precision
processing technologies.

Contact Probe

InterfaceConnector

IC TestSocket

Fine Connectors
Business 1986〜
SPRING CONNECTOR™

Board to Board
Coaxial Connector

Yokowo 2022 Integrated Report06Until now, and from now on.
Using technology, Yokowo will continue to pioneer
1990sVehicle
Communication
EquipmentBusinessthe next generation.

2000s
Amplifier for
Glass Mounted
Automobile
Antenna

Microwave
Components

GPS Antenna

Diversity
Antenna for
Automobile TV

AM/FMMicro Antenna

Transmitterfor VSAT

Antenna for
SDARS

Tollgate Antenna
for ERP2010s
Laminated Antenna for
Digital Terrestrial Wave
(Front Type)

Yokowo provides the worldʼs leading
automotive manufacturers with high-sensitivity,
high-quality, and durable vehicle antennassupporting wide frequency bands. The
world-leading micro antennas developedby Yokowo have transformed vehicle
radio antennas from being mechanical toelectrical components.

Rod Antenna
Cellular Antenna

Multiband Internal Antenna
for Cellular Phone

Wire Coupled Antenna

Ceramics &Electronic Devices

Sporting Goods
Golf Shafts
Prelude Pro

1996〜

Patch Antenna
for GPS

Yokowo — towards a new 100 years

Chip Antennafor Bluetooth

Combined Roof
Antenna (Hex Band)

Tollgate Antenna
for ETC
Yokowoʼs LTCC business,based upon ceramics
technologies, has been incommercialization since
the early 2000s. In 2019,Yokowo establisheda joint corporation as
LTCC Materials Co., Ltd.,
achieving an integrated
production system frommaterials development
through to productmanufacturing.

AM/FMShark Fin Antenna

2020s

GNSSAntenna

Combined Roof Shark Fin
Antenna (Cellular/GPS/SDARS)

These days, the communications environment continues its
dramatic evolution, with 5G, IoT, etc. Yokowo will continue toleverage its world-leading technology and originality to offer
the unique antennas demanded by society.

Tire Pressure
Monitoring System

LTCC Interposer
Substrate

12inch Interposer
Substrate

Ultra Thin
LTCC-CSP
Substrate for LED

Ultraminiature
LED Ring Lightof LTCC

Substrate forVehicle

Microwave Technology
Antenna Technology
Micro Precision Processing Technology
Ceramic Technology
Surface Modication Material Technology

Special surface processing of materials
adds value to products, including interms of abrasion resistance, heat
resistance, adhesive capabilities,and appearance. This is a promisingtechnology that promotes productdifferentiation and high functionality.

Circuit Testing
Connector Business
LCD Panel
Test Head

Fine Connectors
Business

BGA Test
SocketCoaxial Connector
for Antenna

Low Profile
Contact Probe

High GigaSocket

Multi-Contact
Coil Connector

Vertical ProbeCard2-Piece BladeConnector

Micrograph of
Mechanics Parts

Board to FPC/MicroWire Connector

Penprobe

MEMS Probe
Card (YPX)

Waterproof
I/O Connector
Lead Socket Connector

Test Tools for
FPC/FFC, Connectors
1993〜

Clip Connector

Microwave Module
Test HeadMicrowave
Function Probe

Probe Connector /Giga Holder

Clip Connector for Board
to Board Connector

Board to Board Stamp

Medical Devices
Business 2006〜
Micro Precision
Tip Terminal
Processing Devices for Catheter
for Medical(Radiopaque Marker)

07

Yokowo 2022 Integrated Report

Core WireHigh Giga Full Shield
Coax Socket

Coil forGuidewire

Assembly of Atrial
Septal Needle

OpticalConnector

Waterproof 2-Piece
Blade Connector

Inspection Tools forInterface Connector
Yokowo has been commercializing medical devices as its
fourth pillar since 2006, taking advantage of its micro
precision processing technology. In 2012, Yokowo acquired
ISO 13485 (medical equipment quality managementsystem) certification, and through a startup ecosystem incollaboration with academia, industry, and government, isaiming to provide innovative medical equipment.

Yokowo 2022 Integrated Report08