REDLINE is a 2009 Japanese animated science fiction film produced by Madhouse and directed by Takeshi Koike in his directorial debut. It is set in the distant future, where a man known as JP takes on great risks for the chance of winning the titular underground race.

The film was in production for seven years, and used over 100,000 hand-drawn frames.

The trailer (linked above) speaks for itself, but here's some of the praise the movie has gotten:

Tim Maughan of Anime News Network gave it a A+, and describes the film as "something very special, very different, and insanely exhilarating." In particular he praises the film's director, saying that "Koike has managed to make all this chaos believable." He goes on to say that "Redline is animation not only at its best, but also largely animation for animation's sake." Although Maughan says some may dislike its techno soundtrack and "minimal plot," he calls Redline "the most insanely exciting, visually exhilarating anime film you've seen in decades."

Tim Jones of THEM Anime Reviews gave the film 5 out of 5 stars. Jones praised the film for its great sense of humor, outstanding animation and characters. Saying that "Redline is an unforgettable anime experience, It's brilliantly animated and drawn, features two cool, intelligent, fun leads". Jones concluded: "Redline is one of the best examples of this not from Studio Ghibli I can think of. It's an anime for grown-ups, no kids or grown-up kids. It's beautiful, gripping, and fun. I give it high recommendations!".

Thomas Zoth of Mania.com comments that if Scott Pilgrim vs. the World was "an assault on the senses ... Redline is a declaration of war." Zoth went on to praise the film for its "imaginative creatures and clever designs", to compare Koike's work to that of Quentin Tarantino, and to compliment the film for its "soundtrack, with its memorable high-energy tracks that greatly complement the chaos onscreen." He concludes by saying that if "the life of the industry has been drained and replaced with rote, cookiecutter shows-by-committee, Redline shows a path out."

Nicolas Penedo of the French magazine Animeland describes it as the "Paris-Dakar revisited à la Ōban Star-Racers", a remake of Hanna-Barbera Wacky Races with arts inspired from Jack Kirby comics and know-how, rhythm and energy inherent of the best Japanese anime movies.The reviewer praises the animation quality as breathtaking, and declares that Takeshi Koike made an homage to comics and films of the 70s and 80s.

Kwenton Bellette and Peter Martin reviewed Redline for Twitch Film. Bellette describes it as a "truly out of this world experience", "Speed Racer on crack." Martin expresses that "it feels like every centimeter of every frame is filled with some kind of kinetic color or action or bit of business, making it an experience that is sure to overload the senses."

Jon Liang of UK Anime Network comments that "A sense of the cool and outrageous is seeped into every pore of the design, ... exaggerated is an understatement here", and notes that the film's "cinema-quality smooth animation" makes "even the most alien of things move naturally and the sense of speed that is often achieved is frequently mind-blowing." He remarks that "the visuals and over-the-top action will most likely overload sensitive brain cells."