The brand was introduced in 1979 as a rollerball pen model, then expanding to the rest of Mitsubishi Pencil products.

Distribution in the United States, Canada and Mexico is by Uni-ball's North American Corporation in Wheaton, Illinois.

[2] Masaki Pencil started to export its products, first to Mexico in 1927, then expanding to other markets including Belgium, Egypt, Portugal, Argentina, India and Netherlands.

[3] While mainly focused on making pens, in 2008 they developed a new mechanical pencil that rotated the graphite lead every time it is lifted from the page to sharpen it into an even cone shape.

[13] Beginning in January 2021, Starline became the exclusive supplier of the Uni-ball brand for the promotional products industry.