Again, sorry, this may not be as Japanese as the title of the blog suggests, but this book too contains some basic knowledge that is essential to begin any kind of exploration.
Like clay, all glaze materials come from the earth. Traditionally, stones, plants and other natural materials have provided the elements for ceramic surface decoration. In an age of synthetic and mass-produced glazes, handmade glazes from locally sourced ingredients allow artists to create unique pieces that reflect their surrounding landscapes. In Natural Glazes, Miranda Forrest guides the reader through the process of experimentation and discovery to create amazing hues from organic materials.
Whether mixing a glaze from scratch or adding local ingredients to a commercial glaze, this accessible book teaches the essential steps.
Find it here: Natural Glazes: Collecting and Making