If I want to practice "sumi e" painting but don't have Japanese ink, can I do it with a water color?

Question:

Or acrylic. (I've posted this in the painting category but no response, maybe in Japan's section someone knows.)

Answer:

You need to use an inkstick. It produces a different and distinct texture and quality than ordinary water color or acrylic I think. It doesn't have to be a "Japanese inkstick" (sumi). You can use any inkstick available in your country. Brushes are also important.