Nakaya Dorsal Fin Version 1 Ishime-Kanshitsu Black
The Nakaya Dorsal Fin Version 1 is one of the most innovative and distinctive designs created by Nakaya. Layers of Urushi lacquer are applied over a period of months to create the fin on the cap, and the surface is then completed with either smooth Urushi or stone texture Ishime-Kanshitsu finish. With either finish, this is one of the most memorable writing instruments Nakaya has produced.
The ebonite used for the cap and barrel is derived from natural materials harvested from the rubber gum tree. Layers of urushi lacquer, combined with urushi powder to create the unique stone finish effect, are then applied over a period of months.
Besides providing a visually distinctive shape, the raised fin on the cap also serves as a built-in roll-stopper. With this pen, function and aesthetics are harmoniously united.


Measurements & Specifications
Cap Type | Threaded |
Closed Length | 5.9" |
Postable | Postable With Caution |
Posted Length | 6.8" |
Barrel Length | 4.7" |
Section Diameter | 0.5" |
Cartridge Capacity | 1.5 ml |
Converter Capacity | 0.5 ml |
Ink Capacity | 1.5 ml |
Filling System | Cartridge-Converter |
Pen Weight | 31 g |
Barrel Diameter | 0.7 |