The Namiki company is owned by the Pilot Corporation. Namiki is the surname of the founder of the Pilot Corporation, which is based in Tokyo, Japan. Namiki is one of the ink lines produced by Pilot. The other line that is very well known is the iroshizuku line.
Namiki ink comes in two colours: black and blue.
I like the feel the bottles. When I first saw the bottle I was worried that it would be too shallow to fill a pen with a large nib. The bottled has a plastic basin. With the bottled closed, tip the bottle over, the basin fills with ink. Turn the bottle right side up, remove the cap and fill your pen. The 60 ml bottle looks very good when it sits on the desk.
Namiki Blue is a bright clean blue. I have liked the ink as it has a vibrant deep blue colour. The ink has excellent flow and it works fine in a variety of pens. The ink dries into a very clean flat finish. Within five seconds in is drying on the paper, just the width of the nib and the corresponding ink on the page may make it a bit longer. I have not experienced feathering, and I use this ink at work on everyting from very good to cheap office copy paper.
The colour is very consistent. If you are looking for an ink with shading, this is not the ink for you. Shading may look good on calligraphy samples, it really does not look good on large amounts of writing.
Like just about all water-based fountain pen inks, this ink is not waterproof.
The other colour, Namiki Black, is a very dark, rich black ink. It ranks up there with the better of the black inks. The same quality writing experience as Namiki Blue.