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Yama-budo
A premium Japanese ink line named after natural imagery: each color takes its name from a scene like moonlight, autumn leaves, or morning glory.
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Paper & pairing
Reds and pinks show the most dramatic shading of any color family: expect real variation between the edges and center of each letter. Sheening inks need the right conditions to show off: a wetter nib and a coated, less-absorbent paper (Tomoe River and similar sheets are the community standard) let the ink pool slightly and separate into its second color as it dries. On cheaper, more absorbent paper the sheen effect will mostly disappear.
About Pilot Iroshizuku
Iroshizuku is Pilot's premium ink line, launched to critical acclaim in the early 2010s. Each color is named after a scene from nature, from moonlight (Tsuki-yo) to autumn leaves (Momiji).
Storing and using the bottle
Bottled fountain pen ink has an effectively long shelf life when kept capped and out of direct sunlight: most inks remain usable for years. The main risk isn't the ink spoiling, it's a pen sitting inked and unused for weeks: that's what causes clogs, not the ink's age.
Frequently asked questions
Similar shades By colour distance
Color shown is a close digital approximation of a typical swatch, not a calibrated color match.