Japanese letters are not only a name but can be written up and down to the left and right without getting caught on the paper.
Write in a middle line that is not thick or thin.
However, the line is not strong or weak
It is also recommended for beginner pen since there is no special addictive to the nib.
10 pens with a plastic case for convenient storage.
Uses: Cartoon characters, backgrounds, effect lines
The line is strong and weak (strong and thick lines, weak for thin lines) means that you can use thick or thin lines depending on the angle and pressure of the nib.
These uses are for reference only, so please use different uses according to the style of your painting or other addictions.

(From Amazon.co.jp)