The impromptu battle between Itsuki Takeuchi and Shingo Shoji is an anime exclusive battle in Initial D First Stage.
Prior to the Battle[]
While taking Saori home, Itsuki Takeuchi is targeted by Shingo Shoji, who thinks his car is Akina's Eight-Six.
During the Battle[]
During their run, Itsuki kept grazing his car on the guardrails due to inexperience in mountain racing. After a few corners, Shingo taps Itsuki resulting to both being injured while crashing.
After the Battle[]
While Itsuki is being hospitalised, Saori leaves Itsuki due to bad memories. This infuriated Takumi and vowed revenge despite Iketani and Kenji heeding him with warnings of Shingo's method of a gumtape deathmatch.