The death of his father in 1950 marked Tōshi's total break from his past and from naturalism. In 1952, Yoshida began a series of abstract woodcuts, influenced by his brother, Hodaka Yoshida.
Tōshi's life changed drastically when his father died in 1950, leading him to abandon his previous beliefs and embrace abstraction.  In 1952, he started creating abstract woodcuts, influenced by his brother, Hodaka Yoshida.