Nakaya Naka-ai Writer Ballpen Kuro-tamenuri GoldKuro tamenuri is a reddish black color that appears very close to black upon first glance. As time goes by, the red color becomes more prominent and less nuanced. The Nakaya Naka ai Writer Ballpen in Kuro tamenuri elevates the sleek, stealthy finish to new heights by pairing it with the functionality of a ballpen with clip. Any Nakaya ebonite hard rubber pen (this includes all Nakaya pens with the exception of the Celluloid, Briarwood, Carbon