Bashō was utilized to write the Haikai as an important means to the reform. Through a letter sent by Bashō to Masahide, economically helped to record the contents Bashō. And there are more records to share the spiritual world in life. The contents are worried with the development of Syomong Haikai is recorded. Although the presence of Masahide, the initial letter of support for economically Bashō, the latter is recorded in the presence of cooperation in the reform of the Bashō's Haikai.
And you can check that goes to develop relationships that accompany the Bashō and Masahide share with their thoughts. Therefore, it can be confirmed through letters, Masahide is simply a person who only economic assistance to Bashō is that it was not. Masahide can be found and participate in the reform of the Bashō's Haikai, through a letter that there was a shared life with Bashō.