Reason:

Panasonic was called National in the early days, but the National brand had already been registered by other companies at that time. In order to develop the international market, Panasonic created the brand Panasonic. The word consists of two parts. The front part is PAN, which means "pan", which means a wide range of things, and the last part is sonic, which means sound, because the electrical products it first produced were Audio equipment.

Because mastusita is just the Japanese pronunciation of "Panasonic", it is not originally a trademark, but only appears in the English version of the company name. Panasonic is a brand founded in 1955. The reason for its creation was that when Panasonic entered the United States, the original National brand was already registered in the United States, so this brand was created. Today it is the main brand of Panasonic Electric.

Extended information:

The origin of panasonic:

Panasonic was called National in the early days. It was gradually changed to Panasonic starting in 1986, and all were unified from October 1, 2008. Panasonic, founded by Panasonic Electric Industrial Co., Ltd. in Japan in 1918, was founded by Konosuke Matsushita in 1918. It has developed brand products covering home appliances, digital audio-visual electronics, office products, aviation and many other fields and has gained a global reputation.

Baidu Encyclopedia-Panasonic