KA-KU Fountain pen ink One Drop (of a Blue Night) Sheen Fountain Pen Pilot Iroshizuku a staple under

Pilot Iroshizuku a staple under the fountain pen enthousiasts

a soft red pinkish color

has a nice vibrant purple color

a turquoise

For other teranishi products

KA-KU Fountain pen ink One Drop (of a Blue Night) Sheen Fountain Pen Pilot Iroshizuku a staple underThe stationery company KA KU is a boutique brand based in Osaka Japan. Their name literally meaning ''to write'' expresses their passion and philosophy. KA KU wants to create an experience around writing, taking notes and journaling. Their product line tailors to those who care about these things deeply. With a variety of products ranging from pen cases, pens to fountain pen inks. The KA KU fountain pen inks are available in a variety of colors, from