Over 100-Year History of Toyo Denki Seizo K.K.
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.

1918~1949

1972 Development of brushless motor generator (BLMG), first in the world

From foundation to postwar
1918 Technical cooperation with Brit1919

ish Dick Kerr and establishmentof the company with the capitalof 3 million yen
Operation started at Yokohama
FactoryDevelopment of 150kVA 440Hz static CVCF, first in Japan

1973 C ompletion of commutation ticket issuing system
1977 Completion of large high-speed automatic drafting machine

1978
1983
1985
1985

Developed our proprietary AFE chopper device
Completion of in-train ticket issuing system Panama Canal Agency ElectricThe current Yokohama Planmt was completed

Locomotive for Dredgers

 elivery of world-first superimposed field excitation control for 205
Dseries 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

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

1989 Development of small VVVF inverter using reverse conductive GTO
thyristor, first in Japan

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

1920 Control equipments and traction mo-Global expansion and to the next 100 years

tors delivered directly to Keihan Electric Railway Co.

 evelopment of stroke switching type door closing machine, first in Japan
1990 D evelopment of pantograph, first in Japan
1921 D
1926 Start of manufacturing of three-phasecommutator motor (AS motor)

 evelopment of electric equipment for1932 DDevelopment of intelligent door system, first in Japan

1991 Development of light-weight VVVF inverter using 1,500V mass-proEarly domestic pantographtrolleybus, first in Japan ompletion of controller with regenerC
ation brake using compound motor,
first in Japan

1949 O ur stocks was listed on Tokyo Stock Exchange

duction 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

1935 Development of diesel electric railcar,
first in our country, and delivered toSagami Railway

1990~20192000 Completion of permanent-magnet moAS motor

tor (ED motor)

2004 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

1950~1989

From postwar reconstruction to high economic growth evelopment of ST type three-phase AC
1950 D2007 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 commercial service of the new N700 series trains on the Tokaido and Sanyo Shinkansen lines (delivery of traction motors, gear units,
pantographs, TD couplings, static conversion equipment, etc.)

Commutator motor (patented)

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

Cardan shaft driving device

1959 C ompletion of automatic train stop
1960 C ompletion of traction motor anddrive 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
Development of hydraulic winch forship, first in Japan1963

Shinkansen E5 series

Japan National Railway 151 series
limited express train “Kodama”

2012 O rder receipt of handsets for conductor for JR West2018 May, Shiga Ryuo Plant completedJ une, Toyo Denki Seizo K.K. 100th anniversaryOrder received for consigned research and Los Angeles County Metropolitan
development of superconducting flywheel Transportation Bureau P3010 LRV
power storage system for railways

2019 Establishment of SIAM TOYO DENKI Co., Ltd. in Thailand stablishment of Chalco-Toyo PermaEnent Magnet Motor Co., Ltd. in Chinato Japanese National Railways
equipment series, first in Japan

Japan National Railway Series 0Shinkansen

1969 Completion of automotive brake test equipment

32008 S tart of sales of the VF66 inverter
2009 Delivered electric machinery for Tohoku

 elivery of pantograph for Shinkansen
D1965 Development of thyristor static Leonard

Beijing subway east-west line train2020 Establishment of TOYO DENKI RAILWAY SERVICE, LLC. in the U.S.

2021

O
 rder received for automobile vehicle testing equipment using in-wheel-well dynamo

In-wheel-well dynamo