The name Iroshizuku is a combination of the Japanese words Iro (Coloring), expressing high standards and variation of colors, and Shizuku (Droplet), that embodies the very image of dripping water. Each ink name derives from the expressions of beautiful Japanese natural landscapes and plants, all of which contribute to the depth of each individual hue.

Old Man Winter is a personification of the harsh and cold winter. This shade of grey conjures up the image of the cold, clear air of the severe winter season.