Happiness Denki Co., Ltd.

Our company was founded in 1919 (Taisho 8).

Establishment.

Reorganized as a corporation.

Opened Kyushu branch.

Opened Chugoku branch.

Initiated research on unitization of power control panels

Delivered the first MU series power control panel 'MU1' to a building in Osaka City

Opened Kyushu factory.

Birth of 'MU2'

At the 10th Electrical Installation Materials Exhibition, first showcased 'MU3', featuring innovative design

Developed the even more rational 'MU4', which became a mainstream product today

Opened Tokyo Shinagawa factory.

Changed the board of the internal unit from an angle frame to a polyester resin molded panel

Added an aluminum panel as the board for the internal unit to reduce the weight of the control panel

Opened Mito sales office.

Shattered the notion that the control panel body must be steel, developed and began selling 'MU5' with an all-aluminum body and fully assembled structure

Received Minister of Construction approval (General-48) No. 3583.

Developed and began selling 'MU6', featuring a novel structure and even more beautiful design

Moved Mito sales office to Hitachinaka City.

Developed and sold 'MU6-2', a low-voltage version of the internal control circuit unit

Moved Tokyo Shinagawa factory to Koriyama City, Ibaraki Prefecture.

Moved Osaka factory to Ohtō City, Osaka Prefecture.

Moved Kyushu branch and Kyushu factory to Hakata-ku, Fukuoka City.

Moved Kansai branch to Osaka factory.

Sold 'MU6-3', an improved control circuit unit of 'MU6-2'

Obtained ISO 9001 certification

Developed and sold 'MU6-4', which miniaturized the internal unit and allowed up to 12 power storage units per side

Relocated headquarters and Tokyo branch to Ota Ward, Tokyo

Completion of the stock yard and warehouse building at the Ibaraki plant

Renamed to Happiness Denki Co., Ltd.

100th anniversary of founding

Became a subsidiary of Sanoyasu Holdings Co., Ltd.