Senku Ishigami T-Shirt Where can I find other senku ishigami designs? Expand or collapse section. In addition to senku ishigami designs, you can explore the marketplace for taiju oki, tsukasa, and gen asagiri designs sold by independent artists. What material is this item made of? Expand or collapse section. 100% combed ringspun cotton. The perfect fabric for a graphic tee and the softest in the business. (Due to product availability, cotton type may vary for 2XL and 3XL sizes) Learn More »…