Anyone familiar with nora2r's works can vouch for him being essentially the living manifestation of the hardcore genre. Having gained an interest in music composition through playing rhythm games from a young age, he's since become one of Japan's most celebrated hardcore techno producers with contributions to a variety of rhythm games like jubeat and SOUND VOLTEX.
nora2r's delicious bass pounding is the cornerstone for practically all of his works, blasting their way into osu! territory through hits like B.B.K.K.B.K.K. and his collaboration with fellow artist xi on Dreadnought. If hardcore EDM is what you're looking for as a mapper, you'd be hard-pressed to find an artist better for the job than nora2r.