We are always out of this pen. Not for lack of affection, it simply takes some attention to bring it in from Japan. I have always imagined it was a secret, how brilliantly it writes. It is not a fountain pen, except that it has a slightly soft beveled tip. Once, it might have been called a sign pen. I use it to sign, to quickly sketch, to make a note. The flexible plastic nib allows variation of line widths but holds a single line when writing. The plastic color is a traditional Japanese dark green, Kuro Midori. When people began buying it in multiples here, I realized this pen was no longer a great secret. Just as well. We shall always carry it, proudly.