Considering the fact that Gyosho and Sosho were used daily and Kaisho was used in formal occasions where one had to express respect, the above change was made in response to the users' demands.
行書・草書は日常的に使われ、楷書は敬意を示すなど改まった時に使用されており、利用者のニーズに対応した変化だったと考えられる。