Complex sentence: The two separate Tokyo dojo both view Manzo Shitama as the hereditary Shihan of Sōsuishi-ryū and both Manabu Ito and Yoshihiko Usuki have traveled to the Sekiryukan to train with Shitama Sensei.
Split into simpler sentences: The two separate Tokyo dojo both view Manzo Shitama as the hereditary Shihan of Sōsuishi-ryū. In fact, both Ito and Usuki traveled to the Sekiryukan to train with Shitama Sensei.