Over 100-Year History of Toyo Denki Seizo K.K.
1918～1949
1918
1919

Development of 150kVA 440Hz static CVCF, first in Japan

Technical cooperation with British Dick Kerr and establishmentof the company with the capitalof 3 million yen
Operation started at Yokohama
Factory

1973
1977
1978
1983
1985

Completion of commutation ticket issuing system
Completion of large high-speed automatic drafting machine
Developed our proprietary AFE chopper device
Completion of in-train ticket issuing system
The current Yokohama Planmt was completed
Delivery of world-first superimposed field excitation control for
205 series electric train of Japanese National Railways

1988 Completion of world-first heat-pipe type 8-unit motor batch control VVVF inverter and delivery of it to Tokyu Electric Railway Co
GTO thyristor, first in Japan

Yokohama factory at the start of operations(Hodogaya-ku, Yokohama)

1920 Control equipments and traction motors
delivered directly to Keihan Electric
Railway Co.

1921 Development of pantograph, first in Japan
1926 Start of manufacturing of three-phasecommutator motor (AS motor)

1932 Development of electric equipment for

Early domestic pantographtrolleybus, first in Japan
Completion of controller with regeneration brake using compound motor, firstin Japan

1935 Development of diesel electric railcar,

first in our country, and delivered toAS motor
Sagami Railway

1949 Our stocks was listed on Tokyo Stock Exchange

1950 Development of ST type three-phase AC
Commutator motor (patented)

Cardan shaft driving device

1952 Development of Cardan shaft driving
device, first in Japan

1958 Completion of traction motor and con-troller for the Japan National Railways“Kodama”limited express

1959 Completion of automatic train stop
1960 Completion of traction motor and drive

Japan National Railway 151 series
limited express train “Kodama”

for Shinkansen testing car
Order received for electric towing locomotive for the Panama Canal
Development of constant-speed operation controller for vehicle, first in Japan
Electric towing locomotive for theDevelopment of hydraulic winch for Panama Canalship, first in Japan

1963 Delivery of pantograph for Shinkansen
to Japanese National Railways

1965 Development of thyristor static Leonard
equipment series, first in Japan

1969 Completion of automotive brake test
equipment3

Toyo Denki Seizo Report 2023

Japan National Railway Series 0Shinkansen

From postwar reconstruction

1950～1989

Global expansion and to the next 100 years

From foundation to postwar

1989 Development of small VVVF inverter using reverse conductive

Group photo of our employees withtechnical advisors from the partner
British Dick Kerr company.

1990～2022

to high economic growth

Our company was founded in 1918 with the intention of “domestic production of electrical machinery for railway vehicles”.
A spectacular feeling that we want to export products to domestic as well as to many Orient countries and contribute to thedevelopment of the country has come from the name of “TOYO DENKI SEIZO K.K.”. And this feeling has been handed
down to successive employees, and now our products are contributing to the development of social infrastructure systems
around the world.
1972 Development of brushless motor generator (BLMG), first in the world

1990 Development of stroke switching type door closing machine, first in Japan
Development of intelligent door system, first in Japan

1991 Development of light-weight VVVF inverter using 1,500V mass-production type reverse conductive GTO thyristor, first in our Japan

1997 Completion of in-train ticket issuingmachine corresponding to automatic
ticket checker

1998 Delivery of electric equipment for Beijing subway east-west line train

2000 Completion of permanent-magnet synchronous motor (ED motor)

Beijing subway east-west line train2004 Development of electrical equipment for the world’s first micro gas
turbine hybrid vehicle
Joint development of the first full-flat, super-low floor light rail vehicle (LRV) produced in Japan
Succeeded in development and running of in-wheel motor for car

2007 The new public transport smart card Pasmo

goes into service (delivery of automatic commuter ticket vending
machine with support for smart card passes and smart card chargemachines to station facilities)
Start of sales of the VF66 inverter

20082012 Order receipt of handsets for conductor for JR West2014 Delivery of electrical machinery forJoetsu and Hokuriku Shinkansen E72018 May, Shiga Ryuo Plant completed

Angeles County Metropolitan
June, Toyo Denki Seizo K.K. 100th an- Los
Transportation Bureau P3010 LRVniversary
Order received for consigned research and development of superconducting flywheel power storage system for railways

2019 Establishment of SIAM TOYO DENKI Co., Ltd. in Thailand
2020 Establishment of TOYO DENKI RAILWAY SERVICE, LLC. in the U.S.
Delivery of electrical machinery for Tokaido and Sanyo Shinkansen N700S(mass-production model)

2022 Delivery of automobile testing systemusing in-wheel-well dynamo

Transitioned to Standard Market of the In-wheel-well dynamo
Tokyo Stock Exchange