millipen (medium)

Written as「ミリペン」, this common abbreviation of "Millimetre Pen" refers to the instrument also known as a technical pen. It has a hard tip and is known for making solid, consistent lines. In this regard, it's easier to use than a nib pen, but there's a trade-off in terms of how much control you can have over your line.

This tag implicates pen_(medium) (learn more).