Japanese-born educator and designer Takenobu Igarashi’s 20-year creative career brought an architectural understanding of form and space to the world of typography, paving the way for a new field of dimensional type from the mid-1970s to today.
Source: Takenobu Igarashi Pushed the Parameters of Typography with His Hand-drawn 3D Letterforms
I have curated a sample of his work on my Pinterest Account.