Koichiro Iketani

Koichiro Iketani (池谷 浩一郎, Iketani Kōichirō, known as Cole in the Tokyopop version) is one of Takumi's friends and works at a local gas station with Itsuki. He was also the senior of Itsuki and Takumi when they were at middle school. Itsuki admires him, as Iketani is the leader of the local racing team, the Akina SpeedStars. Iketani drives a Nissan S13 Silvia. At first, Iketani thinks that the SpeedStars are the best drivers in Akina but later his boss Yuichi tells Iketani of the mysterious driver of an Eight-Six who was the fastest driver in his time, and that he suspects that the driver is the owner of the local tofu shop.

He is an average racer at best, but his skills are decent enough for him to be the leader of the Speed Stars. He is noted by the Two Guys from Tokyo in the S15 to have good corner entry.

It is Iketani (along with Itsuki) who explains to Takumi the practice of referring to street-racing cars by their chassis codes, since this is the simplest way of denoting different body style/engine combinations. For example, instead of specifying the 1983-1987 Toyota Sprinter Trueno or Corolla Levin with the 4A-GE engine (or Toyota Sprinter Trueno 1600GT APEX), one can simply call it an AE86, or more simply, an "Eight-Six".

Mako Sato and Iketani did eventually met up after the Seven Star Leaf arc Iketani was unexpectedly surprised by Sayuki when Iketani is with his mother, and Sayuki is with Mako Sato. Iketani eventually apologies for being late 6 months ago and set up a meeting in Usui. Iketani arrives first, but an old man shows up to ask Iketani for help, because the old man missed his bus, because he ate for too long. Iketani was so kind to accept. A couple of hours later Mako Sato arrives and Iketani isn't there, because he is helping the old man. Iketani, on the way to Mako Sato got a flat tire and has to called Mako Sato. Eventually Mako Sato arrives to see Iketani and eventually talk. Mako Sato tells Iketani that she is going to to "Tokyo" to race. Iketani was so surprised that he didn't say what he was gonna say, so he supported Mako Sato without her knowing that Iketani loves her. Iketani admits to Kenji that the reason Iketani didn't confess to Mako Sato is because his love for her will just slow her down.

He apparently still lives with his parents.

Sayuki calls him "Ichikoro", much to Mako's embarrassment.

He has safely confirmed that he is not a crazy serial killer.

Likes: His beloved Silvia S13, he gets happy when someone says they like the S13, Mako

Dislikes: Silvia S14, Silvia S15, Shingo, two guys from Tokyo.

Special skills: Corner entry, E-brake cornering, heel and toe drift, mechanical knowledge.

Bunta Fujiwara
Prior to Takumi's legend, Iketani was Bunta's huge fan and would often look up to him to race in Akina SpeedStars' place after the RedSuns challenged them.

Takumi Fujiwara
He is a workmate and a friend. Takumi would often look up to him on engine knowledge and mechanical advice ever since he got his Eight-Six engine completely fixed. He too relies so much on Takumi to race for them until Takumi's victory against Seiji Iwaki (as he no longer wishes to race on his home turf anymore).

Kenji
His best friend who was the second to join the Akina SpeedStars.

Itsuki Takeuchi
A workmate and a friend who would eventually join the SpeedStars after Takumi drove his Eight-Five trying to outrun bullying street racers the night before.

Mako Sato
He first saw her have car troubles. After fixing her car, she hands him her phone number and began to fall in love. After Takumi's battle and fun at the waterpark during Summer break, she eventually leaves him after failing to show up on an organised meetup. But during Extra Stage, it is hinted she still has an interest to Iketani.

Trivia

 * Shuichi Shigeno has stated that Iketani is his favorite character, according to some interviews.
 * Iketani appears in MF Ghost in chapter 96 where he still lives in Shibukawa and still works at the gas station (although it is an ENEOS EV station).In addition to becoming the general manager of the gas station (replacing Yuchi), he is the only one of the SpeedStars to be single and without kids. He is also shown to be balding.
 * The reason is because Iketani could not forget Mako in the years following the initial D and for this reason, he prevented the young Iketani (also because of his personality) from finding a girl.
 * Iketani was first character to have a dialogue in the Legend trilogy, where he states about how late the time was while driving downhill from Mt Akina moments before he encounters the impromptu battle between an AE86 and an FD3S.