The logo mark is a combination of M and A, because the shop is called MA (mˈæ). MA stands for a space or room in Japanese. English speakers often misread the shop name MA by So Shi Te as Maybe so shite, but it is pronounced mˈæ bɑɪ sóʊ ʃi te. I am already tired of people telling me that the shop name can be pronounced as maybe so shite, so if you read the shop name “incorrectly”, please just keep it to yourself and remember that English is not the only language spoken in the world.
So Shi Te is a Japanese word meaning then or and. The company name is So Shi Te Co., Ltd. and MA by So Shi Te means a shop called MA operated by a company called So Shi Te co., Ltd. Little complicated, but the shortened name is simply just MA.