Du is a self hommage to Uncertain Felttip. Uncertain, made in 2008, is a typeface which reproduced faithfully the style in which I am writing on copy paper, usually using the felt-tip pen. This time, I wrote the new family by the same method but using the tablet PC and the touch pen. Although, as for some characters, Uncertain differs in a form, it is the result of reflecting my hand writing. I wrote all the characters. If it is original, all the characters diverted and composed, for example, characters, such as Aacute and Agrave, are written. Different specification from Uncertain is family composition. Although Uncertain had only 3 weight, 7 weight were designed for Du. This way a user can choose his favorite weight because the variation of weights increased.