His father was a ceramic artist and head of the Kyoto Industrial Craft Company.Kobashi learned printmaking from the sōsaku hanga (creative prints) master Unichi Hiratsuka.In 1955, Kobashi graduated from the Kyoto College of Crafts and Textiles, and in 1959, he moved to New York City.Nelson Rockefeller (governor of New York and later vice-president) was Kobashi's patron, and acquired one of the artist's sculptures for the New York State Executive Mansion in Albany.[2] Kobashi is best known for his sōsaku hanga woodblock prints and his sculptures intended to be rearranged, which he called "self-constructions".