Ittetsu did not use traditional tipping materials (like Iridium). Instead, he ground the stainless steel or titanium directly into a long, tapered point. This creates a "naginate" (sword-like) geometry. The slit is often cut extremely deep into the nib to allow for a surprising amount of flex, despite the needlepoint tip.

While "015" may refer to specific production codes or product iterations within the Silk Labo catalog, the brand itself is characterized by its departure from the "working warrior" salaryman masculinity toward a "shining, sparkling" neoliberal ideal of modern intimacy. Taylor & Francis Online References and Further Reading: suzuki ittetsu silk 015