It is a denim jacket of [Mt. Fuji denim] woven in the land of Ihara, Okayama prefecture using the thread kneaded with lava of the world-famous Japanese symbol [Mt. Fuji]. The lava of Mt. Fuji emits far infrared rays and has bactericidal effect, sweat deodorant, and effect of warming things from the core. [Yamagata Sashiko] with a mountain shape is used on the back of the rear yoke. And this denim fabric is woven by Toyota Industries "G3" which was made half a century ago. This denim is as powerful and dignified as [Mt. Fuji].