Sojia is a professional surveying and mapping instrument manufacturer with a long history in the world. It was founded in 1920 and was originally named the Surveying Machine House. In 1943, the Measurement Machinery House was listed on the Tokyo Stock Market and became a world-renowned professional surveying and mapping instrument manufacturer. In 1992, in order to adapt to the development of globalization, the Measurement Machinery House was renamed Soka Co., Ltd. In 2008, in order to achieve the goal of becoming the world's first professional surveying and mapping instrument manufacturer, Sojia and Topcon merged and renamed Sojia Topcon Co., Ltd.

Sojia products are known for their high precision and high reliability, and their products are highly welcomed and praised by professional surveying and mapping professionals around the world. Sojia's product series includes: GPS/GNSS satellite positioning system, full-station gyroscope, total station, electronic/laser theodolite, optical/electronic level, etc. These products are widely used in geodesy and engineering construction fields such as highway, railway, water conservancy, energy, and municipal, and provide good solutions for industries such as structural monitoring, ship manufacturing, industrial geometric measurement, and oil tank volume calibration.

For a long time, Sojia has worked hard to devote all its resources and strength to the surveying and mapping industry, with the concept of "concentrating on, creating new value, and contributing to the world", product quality as the foundation, market demand as the orientation, and continuous development and innovation , provide customers with high-quality products and services. Entering the Chinese market in 1985, Sojia was a surveying and mapping instrument brand that entered the Chinese market after the reform and opening up.

Topconsojia (Shanghai) Science and Trade Co., Ltd. Beijing Branch - is a wholly-owned subsidiary of Topcon Positioning Systems Company in the Shanghai Free Trade Zone. The Beijing branch is a branch registered in Beijing. As an operation center, it is responsible for managing the marketing, channel distribution, technical support, after-sales service and business expansion of the Sojia brand under Topcon Group in China (including Hong Kong and Macao) and Mongolia.