Much of his early work as a designer and sculptor was featured in his Hobby Japan magazine column titled "Creature Core", which featured at least one of his sculptures in each monthly issue and was later collected as a hardcover book of the same name.
[2] As part of his work for Hobby Japan, Nirasawa did character designs and cover art for the video games Beast Warriors and A-Rank Thunder Tanjouhen,[3] and illustrations for Japanese RPGs, including illustrations of Michael Moorcock's Elric for the Japanese edition of Stormbringer.
[4] 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, the villains Goludora and Shilubara, and the Phylloxera Worm, respectively.
His designs for the various Tokusatsu productions are published in UNDEAD GREEN BLOOD, GITAI, SAY YOUR WISH, and ZANGYACK WORKS LOG.
Nirasawa died on February 2 2016 due to complications from chronic renal failure.