The Uni-ball One has, with its gem-like clip, become something of a style icon. But it's not just the design that makes this pen unique. The ink in the cartridge is specially formulated to stay on the surface of the paper rather than being absorbed into it. The non-absorbent ink ensures that the color remains vibrant, and the ink dries quickly without smudging on the paper.

Take this with a pinch of salt, but according to a study at Ritsumeikan University in Japan, students who took notes with a Uni-ball One pen with black ink could better remember the information than students who took notes with regular black ink.

The Japenese Taste series is of course insipired by Japanese culture. This set includes the colors Mamedaifuku, Bellflower, and Loquat Fruit with a 0.5 mm tip.

Available in various colors.

Please note that the ink in the pen roughly matches the color of the pen body.

Refills can be found here.