Lots of it.
At the start of the film, a mysterious being strikes a woman, causing her to reveal numerous torso-to-neck injuries. It is seen on the woman when the mysterious being jumps away.
The same mysterious figure with yellow vision attacks and wounds 7-10 security guards.
As this is a re-imagining of the titular hero, Kamen Rider, there is lots and lots of blood in it.
The Kamen Riders' transformations result in bloody retinas, orbs will first be usually seen in the forehead, splitting the human skin around it.
When a rocket-launcher is launched towards a metallic-storage room, it explodes and bursts into flames. The pre-transformed insect-humanoid creature is caught on fire and struggles to briefly transforms back to his human-self, before finally dying, succumbing to his injuries.
A woman fires a M202 rocket-launcher at two Kamen Riders in the midst of fighting, one flies in the nick of time but the other isn't as lucky, and explodes to his death.
One Kamen Rider's transformation requires him to peel his human face off to reveal his true grasshopper-humanoid like identity.
Yeah, as I've mentioned, this is one gory film. Kicks result in people spitting blood numerous of times.
When people are shot, their wounds are not seen as they tend to conceal the wound but blood spurts out in numerous volumes. Though we know it's not very realistic blood, it does resemble the color of fruit punch.
In the climax, a Kamen Rider slaps, punches and kicks a scientist relentlessly for killing the protagonist Kamen Rider's romantic partner. Facial scars and peeling of the skin is seen. The scientists spits out large volumes of blood and so does his body spurts reddish blood. Once the scientist is dead, you clearly see his heavily-bloodied lab coat.
One Kamen Rider rips out another's head and spine together. Green fluid, presumably grasshopper blood is seen dripping down the spine.
Our protagonist Kamen Rider friend receives disturbing visions of people getting murdered, and transformation scenes involved splitting of heads and such due to his ability to communicate with other grasshopper-humanoid pals.