Over at Cool Tools, Michael Aaron Dennis recommends Jet Pens, a site that sells Japanese pens.
Japanese pens are simply the coolest pens on the planet. Whether for writing notes, manga, or drawing, Japanese pens are the best. The finest are .18mm while the widest are brush pens that will allow you to practice your kanji. They also come in colors that will never see the inside of a Staples or and Office Depot.Hold on to you wallet.
The best place to get them is a web site called Jetpens.com. Given the exotic character of the merchandise, the prices are fine, but the extras, such as Japanese stationery, erasers, pen holders, and notebooks are simply amazing. Where else can you buy erasers that are also a game of balancing the erasers in an ark on your desk? And the colors, ranging from yellows and pinks to the office standards, are just awesome.