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Yonomori Sakura
Pentonote is one of the 713 brands in Inktend's built-in ink catalog.
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Paper & pairing
Blues and navies are the most broadly "safe" fountain pen colors: legible, professional, and unlikely to raise eyebrows in an office. This ink will behave predictably on most fountain-pen-friendly paper. Cheap, highly absorbent paper (standard copier paper) will dull any ink's saturation and can cause feathering or bleed-through with wetter nibs.
About Pentonote
Pentonote is a stationery shop in Fukushima City, Japan, run by a family that has been in the stationery business for nearly a century. Alongside store-exclusive Sailor and Pilot pens, it produces original fountain pen inks, most notably the "Letters from Fukushima" series inspired by Fukushima landmarks and nature. The shop also operates a cafe and reading space and ships its inks internationally.
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.