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Amakusa
Kogyokudo 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 Kogyokudo
Kogyokudo is a stationery specialty store in Kumamoto, Japan, founded in 1919 (Taisho 8) by Hayashi Suzuki. Located on the Kamitori shopping arcade in central Kumamoto, it sells stationery, art materials, and office supplies, and produces original fountain pen inks themed on local landmarks and specialties such as Amakusa, Kusasenri, and karashi renkon.
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.