After learning at the art colleges, Inokuma continues pursuing his artistic creativity in his hometown, Fukushima. Although he only starts applying himself closely to art when he passes 40 years old, soon after wins Aoki Shigeru Memorial Award in 1996 and semi-grand prize at Fukushima Prefectural Art Exhibition in 1998. Developing the texture by using coffee powder and sanding down the surface, he brings the exquisite concurrence of comfort and sharpness into the work. Above all, his ultra marine blue works, called Inokuma Blue series, are highly admired both internationally and domestically. In 2016, at the grand opening of Whitestone Gallery Hollywood Road in Hong Kong, his impressive world of blue causes strong resonance with visitors.