Birthday: January 13

Zodiac sign: Capricorn

Blood type: B

Pen name: Benjamin Takeyo

Favorite manga: Hunter x Hunter, Berserk

Favorite anime: Patlabor the Movie

Favorite video game: Dragon Quest III, The King of Fighters '95

Ringtone: Yen Town Band's "Ai no Uta"

The third president of Genshiken. At first in denial about his otaku nature, Sasahara eventually accepts and embraces it. He loves hentai PC games despite not owning a computer until volume 3. When Sasahara assumes the title of Genshiken president from Madarame, his first decision is to push the club's initiative, and establish their own booth at Comic-Fest. While Sasahara is pretty much the "normal" otaku, his unwavering loyalty to a single character (Kujibiki Unbalance character Ritsuko Kübel Kettenkrad aka "The Chairman") makes him stand out from the others. Even the dōjinshi created by Genshiken under his leadership is a Ritsuko-themed one. Sasahara gives up being president during his senior year in order to focus on studying and finding a job, and passes the title on to Ohno.

While Sasahara starts off as a quiet, reserved member of Genshiken, he transforms into a somewhat stronger-willed individual, especially during his presidency. While not completely confident in himself, he is able to find a job as a manga editor and even fight back his own doubts in order to confess his feelings for Ogiue. As of the end of the manga, Sasahara is still dating Ogiue, and accepts the fact that she is using him as a direct model for doujinshi. Sasahara also helps Ogiue by providing criticism and being an unofficial editor for her work in general, despite the possible risk to their relationship.