Fudepen

[1][2] The fudepen was invented by Sailor Fountain Pen Co. Ltd. in 1972, but Kuretake Co. Ltd. made it commercially successful with their release in 1973.

[3] Meanwhile, Pentel, the original manufacturer of felt-tip pens, introduced their own fudepen in 1976, and became one of the earliest brands to adopt proper nylon bristles.

The 'Pocket Brush' used replaceable waterproof ink cartridges in a similar vein to fountain pens.

Fudepens (designed and recommended for calligraphy) have also gained popularity among comic book artists, who choose them to ink their works instead of dip pens or traditional brushes.

[4] Another two Japanese brands, Sakura[5] and Tombow,[6] manufacture and sell brush-tip markers, named "brush pens" by themselves, although unlike Pentel or Kuretake products, Sakura's and Tombow's don't use the same type of ink and do not use refillable cartridges.