Dobuchi has a particular interest in yohen tenmoku, an elusive technique—once thought lost to the depths of time—that creates iridescent, galaxy-like specks of striking blues on a deep black canvas. Dobuchi painstakingly recreated the technique after intensive research, finally allowing the world to see new yohen tenmoku pieces once again.

Historically, “tenmoku” referred simply to black-glazed tea bowls. The definition later broadened to include a range of pieces with iron-rich coatings. These coatings undergo chemical reactions during the kiln firing process, leading to individual, distinctive patterns.

Among the many expressions of tenmoku glaze, yohen tenmoku is perhaps one of the most mysterious and revered. With its celestial patterns and mesmerizing play of color, it has captivated those devoted to tea, fine ceramics, and artistic craftsmanship for generations. Today, only three known ancient yohen tenmoku bowls survive, all housed in Japan and designated as National Treasures.

Dobuchi, through thousands of tireless experiments involving glazes, firing techniques, and kiln atmospheres, succeeded in achieving what many had long believed unattainable: the creation of new yohen tenmoku masterpieces.

His dedication stems from the unique visual qualities of this centuries-old glaze. Dobuchi explains, "The brilliance of yohen tenmoku lies in the color shift—sometimes appearing deep blue, other times glowing in shades of purple and silver. No other tenmoku has this kind of visual effect."

Yohen tenmoku’s prismatic glow is an optical phenomenon. Its coloration, much like the wings of a butterfly or the sheen of an opal, shifts depending on the angle of light—an effect produced by the refraction occurring within the glaze. This shimmering depth is what defines the true form of yohen—and what distinguishes Dobuchi’s work.

While yohen tenmoku is considered the most elusive tenmoku technique, other tenmoku finishes have long been celebrated for their beauty. For example, yuteki tenmoku, likened to oil-spot patterns for its delicate silver or gold speckles, achieves its luster through controlled cooling. Konoha tenmoku, tree-leaf tenmoku, takes a different approach, incorporating real leaves into the firing process, preserving their intricate organic patterns within the ceramic surface.

Beyond his work in these classical styles, Dobuchi has also developed new variations with newfound glaze styles. His original works are the result of continued experimentation and the pursuit of newfound beauty.

Dobuchi’s relentless pursuit of glaze excellence ensures that every piece carries both natural spontaneity and technical mastery, a balance he considers fundamental to his craft.