Eiji Kubo

Eiji Kubo (久保 英次 Kubo Eiji) is the Chief Mechanic of Sidewinder.

History
Prior to the beginning of Project D's Kanagawa Expedition, Eiji Kubo was hired by Go Hojo to be the chief mechanic of his team, Sidewinder. Kubo and Hojo put into motion the four lines of defense, a series of four Kanagawa based teams, Team 246, Team Katagiri Street Version, Team Spiral, and Sidewinder, in order to protect Kanagawa's reputation as the holy land for street racing, and to beat Project D, ending their crusade across Kanto. Sidewinder would use each of the previous teams to gather information about Project D's drivers, in order to prepare themselves to face them.

Kubo and Go watch the battles between Project D and Team 246. The two exchange predictions of how the race will go. Mid way through the race, Kubo comments that drivers of Evo s (such as Kobayakawa) always take faith that their car is the best on the streets, due to their rally heritage. He says that they aren't technically wrong, as they will do you good, but their four-wheel drive isnt all it's cracked up to be on the mountain roads. Kubo predicts the race will only last one round, and he is proven correct when Keisuke Takahashi beats Kobayakawa, leaving him seven seconds behind him. During Takumi Fujiwara's battle with Satoshi Omiya, Kubo is initially unable to make a prediction, as while Omiya is a good driver, he knows so little about Takumi and his Eight-Six, and he believes that there's more than meets the eye with both of them. Kubo is surprised when Takumi wins, and is saddened that he wont be completing a time trial, though he understands why.

The day before Project D's battle with Team Katagiri, Kubo plants several people around the course in order to gather data about Project D. Kubo says that he wishes to watch them himself, and asks if Go wants to come with, which he declines. Kubo tells him he thinks the data will all be for nothing, as he thinks Katagiri will be able to win, and that even if they couldn't Spiral or Sidewinder could easily take them out. Go responds by telling him that Ryosuke Takahashi isn't the type to chicken out. Kubo enquires about Go's relationship with Ryosuke, and he tells him that he doesn't have much of a relationship with him, and that he's actually got history with his brother, the Grim Reaper of Kanagawa.

During Takumi's battle with Kai Kogashiwa, Go asks for Kubo's opinion on Kogashiwa. Kubo tells him that Kai hasn't been able to accomplish much professionally, citing the fact that official races are less about the driver and more about the car, calling Kai pretty typical. As Takumi and Kai pass the pair of them, Kubo comments that Takumi will try and pull something, similar to how he did in his battle with Omiya, saying that it's too soon to say how the race will turn out. Kubo's prediction comes true, and Kai loses, much to Go's surprise. Kubo asks Go how he thinks the uphill battle will turn out, Go tells him that he doesn't expect Minagawa to lose to an amatuer, but that he'll be in surprise when he sees how good Keisuke is. Go elaborates, saying that Keisuke is well trained and really good with the accelerator, and on top of that he's got Ryosuke helping him, the whole way. Kubo and Go both agree that neither Minagawa or Keisuke will go down without a fight. Midway through the battle, Kubo talks about the Supra, saying its designed for a different purpose than the FD, explaining that the FD has an advantage on a mountain pass due to its much lighter weight. Kubo gets an update from his people around the course, and is surprised to see just how fast the two drivers are going. He mentions that the race will be decided by whoever's tires can hold out the longest.

Later, news spreads about the return of the Grim Reaper. Kubo brings this up to Go, who tells him that he hasn't seen his brother in a long time, and that he doesn't know or care what he's been up to. Go continues, explaining that the Grim Reaper is after Ryosuke, as they were both in love with the same woman, Kaori, who commited suicide two years ago.

During Project D's practice runs on Nanamagari, Kubo comments that it's likely to rain the next day, and Go adds that that'll likely give the Team Sprial the advantage. Kubo counters, saying that Sprial rely on the superiority of the cars, so it'd be more likely that it would even the playing field. Kubo says that if it rains Hiroya Okuyama won't be able to beat Takumi, further commenting that Takumi is a natural.

As Keisuke's battle with Ryuji Ikeda starts, Kubo comments on Ikeda driving lead, saying that he's put a lot of pressure on himself, both having to set the pace and deal with the conditions of the road. After the battle, Kubo says that was a very interesting uphill, noting that it was more dramatic than even high-level motorsports. He says that he thinks the downhill will be even more astounding. After the downhill Kubo expresses his disapointment that they couldn't get as much data as they wanted due to the fog.

During the preparation for the final battles, Kubo talks with one of his assistants about how you should tune a car for the circuit. His assistant gives a good answer, and Kubo goes on to explain that its harder to tune for the streets, as they aren't the safest or easiest to drive on.

Relationships
Go Hojo

Mrs. Inui