These are the most reliable pens for drawing sketches, and making art in my opinion. It is Mitsubishi pens uni pin fine line. They are produced in Vietnam, but it is Mitsubishi in Japan that engineered the pens.

They also produce them in colored versions, and are my favorite pens for drawing sketches and pieces of art. They can be bought in calligraphic versions, and are in 0.5 to 9.0 in thickness.

I really like Mitsubishi for their quality product that I enjoy buying here in Denmark.