Uni-Ball x Yohaku Gel Pen with CharmUniball x Yohaku Collaboration Gel Pen 0. 5mm Black Ink Charm with classic Yohaku designs Uni ball One is very easy to write with. Not only does it feel smooth and easy to write with, but it also dries very quickly! It also works great with tracing sticky notes. It writes very nicely without skipping. Yohaku produces more than 150 kinds of original masking tapes and other paper goods by collaging various materials, such as chic ones unified in