NijiJourney is an image ai specialized in anime and illustration drawings. Its now fully integrated into Midjourney, simply add –niji to a prompt, to get really cool anime and illustrative drawing styles…

Check out the website for additional information. Its a collaboration between Spellbrush and Midjourney.
To use the style simply add –niji to any prompt to activate it.
Here are some examples:
Spaceship


Nymph


Street


As you can see, the nijijourney style is way more anime/cartoony than the default midjourney style. You can also see it like a different model type in Stable Diffusion. Give it a try!