The word "Shidokan" consists of three Kanji (Chinese characters).

Shi' (志) means will or resolution as noun, and it also means to aspire to something, as a verb.' Do' the same character as Do (道) in Kendo, literally means road, but it also means way or path along which one proceeds all one's life. 'Kan' (館) originally means a hall and is a general term for a gym.

Therefore, when all three are combined, it means "a hall for all who aspires to take the path".