Highlight
Koh-Sai's forged rings boast the world's highest level of hardness and strength through a proprietary process that combines traditional forging and cutting-edge computer cutting.
We offer high-quality forged bridal rings that will last a lifetime under our new in-house brand "MILLENNIUM TANZO"
and our own brand "etna" that pursues the beauty of forging.
We have solved the problem of low design quality, which has been said to be a disadvantage of forged rings, and will introduce top-level wedding rings in terms of both design and quality.
