Toshiba is the largest semiconductor manufacturer in Japan and the second largest integrated motor manufacturer of Toshiba notebook computer, which is subordinate to Mitsui Group. Toshiba, formerly known as Tokyo Zhipu Electric Co., Ltd., was formed by the merger of Zhipu production office and Tokyo Electric Co., Ltd. in 1939; It has been 140 years since it was founded in 1875. In 1939, it was formed by the merger of Zhipu production office of Co., Ltd. and Tokyo Electric Co., Ltd; It has been 140 years since it was founded in 1875.