Yasushi Nirasawa (韮沢 靖 Nirasawa Yasushi, August 26, 1963-) is a Japanese illustrator, character designer, and model maker born in Tochio, Niigata Prefecture. His first works were as the conceptual artist for the film Space Truckers and the set design of Vampire Hunter D. His major debut as a character designer came when he designed the Undead for the Kamen Rider Series Kamen Rider Blade. He was then brought onto the Godzilla: Final Wars team to design Gigan and the X Aliens featured in the film. He also designed the Horrors of GARO, the Worms of Kamen Rider Kabuto, and the Imagin of Kamen Rider Den-O. In 2009, he was brought onto the productions of Kamen Rider Decade, the Cho Den-O Series, and Kamen Rider G in designing the Paradoxa Undead, the Alligator Imagin, Kamen Riders Goldra and Silvra, and the Phylloxera Worm, respectively.His designs for the various Kamen Rider Series productions are published in UNDEAD GREEN BLOOD, GITAI, and SAY YOUR WISH.