Even if you don't draw anime style here are some fun tips for watercolor sketching given by Hayao Miyazaki best known worldwide for Princess Mononoke, Spirited Away, The Wind Rises and is head of Studio Ghibli animation in Japan.
Hayao Miyazaki’s advice on how to use transparent watercolors in the booklet of the Ghibli Museum Sketching Set.
Title: My recommendation. Transparent watercolor is good.
“transparent watercolor has a strong habit”, “do not paint stickily and paint after wiping the extra paint and water off”, “paint thinly the bright part”, “had better not use white” (no tinting), “paint other color after under color has dried”, “let’s mix the color and use it.”
Light the wool which protrudes on a new painting brush. (singe the frayed ends on a new brush with a lighter)
Anything is fine for a water vessel.
A retractable knife is enough for the pencil sharpener.
One 2B pencil is enough for the pencil.
Divide the palette into seven zones: Bright, Dark, Black, Green 1, Green 2, Blue 2, Blue 1.
Do not use the eraser.
Do not draw a guideline for a picture. (pencil lines will easily show through and excess graphite will muddy your colors)
“These painting materials are enough for a 2-week trip and preparations for a movie.”
This was the original translation, I added some notes where applicable but the important parts are all outlined.
Notice that he actually uses bamboo brushes for watercolor instead of the usual short handled ones. Bamboo brushes made from horse hair (usually red in color) work quite well for traditional watercolor painting. The only white ones I have access to (like in the pic) are made from goat hair but are better suited for ink washes and rough dry brush techniques.
Really, any watercolor brush will work just fine
Originally sourced off Tumblr