About the Kyo-iro inks.
They are made by the Dye technic organization which has a 300 year experience making vegetable based inks called "Kusakisome" for textiles like kimono's.
The Kyo Iro inks are not vegetable based inks. But they tried to reproduce the look and feel of the Kusakisome.
So the experience of ink making is definately there ! One of the "Masters" helped to develop the Kyo-Iro inks. As everything in Japan all products are of a high quality !
So these inks are not known yet but I'm sure you'll find them very particular.