|Japanese Voice||Tokuyoshi Kawashima|
|English Voice||Joel McDonald|
Takamasa is first introduced in chapter 16 of the manga when the Kōgon Sect finally granted him the rank as Gon Sojo through promotion after Shuji Isaki got killed off during his battle against Mizushima and therefore, taking his rank as a replacement. They both had a complicated relationship. While they both seem to have a romantic feelings, they are incapable of acting on their feelings due to Itsuki's nature as a Shikabane Hime.
In the anime adaptation, Takamasa first appeared in episode 5 who initially worked as a nurse of Ouri's high school along with Itsuki who also visited there as a transfer student. Later in the episode, Takamasa and Itsuki would finally reveal themselves working for the Kōgon Sect when they were confronting the traitor monk, Akasha Shishidou while rescuing Ouri. He is also the former freind of Tomoharu Kishibe who became a Shikabane after he died in a car accident with his parents and sister when a group of teenage drivers made them fall off the cliff. Four years later, Takamasa and Itsuki would later kill him near the end of episode 4 of season 2.
- His nickname is "String Beat"
- He has Type O Blood
- His height is 172cm and his weight is 60kg
- His age is 19 (born December 29th)
- His favorite food is fried eggs and dried mackerel
- He dislikes time-consuming things
- His specialty is "having many interests and special talents"
- His eyesight is 40% functioning in both eyes