Keisuke Takahashi (高橋 啓介, Takahashi Keisuke, known as K.T. in the Tokyopop version) is the secondary protagonist of Initial D and was a member of both the Akagi RedSuns and Project D. He is the driver of a Mazda ɛ̃fini RX-7 Type R FD3S. Originally a bōsōzoku gang member, he was recruited for the RedSuns by his brother Ryosuke to partake in his plan to take over the underground street racing scene around Japan. Alongside Ryosuke, they are known as the Rotary Brothers.
Unlike his older brother's calm demeanor, Keisuke was a hot-headed individual, he was known for driving with his emotions and his dislike for losing made him very arrogant. His pride was shattered when he encountered the mysterious AE86 during a practice trial on Mount Akina. Unwilling to accept this loss, he continually traveled to Akina to encounter the Eight Six again. He finally got his chance during the RedSuns race against the Akina SpeedStars when the AE86 driver and future rival Takumi Fujiwara arrived where he was defeated once again, since this defeat he has desired to have a rematch with Takumi until the time was right and both have become rivals since.
When Ryosuke later disbands the RedSuns in favor of Project D, Keisuke joins as well becoming a main driver of the team alongside Takumi. Under Ryosuke’s mentorship, he gained more experience as a racer with his skills dramatically improving and no longer driving with his emotions and controlling them. After Project D’s final race with Kanagawa’s Sidewinder, he pursues his goal as a professional driver, taking his Project D mechanic Tomiguchi with him.
In the new manga MF Ghost, Keisuke has retired from racing and is now the CEO of TK Mach Corporation.
As Takumi trained Kanata, Keisuke also trained one of his students to compete in MFG: Moroboshi Sena, a Toyota Supra MK5 driver.
Likes: His beloved FD, winning, Ryosuke, perfecting his skills, Takumi (despite rivalry)
Keisuke appeared in MF Ghost as a CEO of TK Mach Corporation with Kenta.
Keisuke is apparently most famous for the words "Nani" (what) and "Kansei dorifto" (inertia drift) when he gets overtaken by Takumi performing said maneuver, which became a meme.
Keisuke and his brother Ryosuke were parodied in Kaido Battle 2 & 3, two touge racing games by Genki. Keisuke was parodied as Ryuji Hashimoto (Mischievous Fool in KB2, HC Top in KB3) of Akagi BlueSign.