Pilot is one of Japan’s big three in the fine writing and stationery products world. They make an enormous variety of products, and some of the best pens in the world. Their high-end Namiki brand pens are coveted by writers and pen collectors throughout the world. They make a standard line of inks branded as Pilot, and a premium brand in the Iroshizuku series. Iroshizuku inks are considered by most to be of exceptional quality, and they offer a nice variety in the series. The Iroshizuku 50ml bottle is among the finest for both function and aesthetics.