As the name suggests, Koga's popular series ``Hooyoroi Hai'' is a unique sake cup that imitates a piece of armor that completely covers the body from the tip of the chin to the cheek, making it appear as if one is wearing armor when drinking sake.
The motif is a piece of armor known as a ``kawari kabuto,'' which has a unique and unique design and is said to have been worn by warlords from the Sengoku period. Koga was inspired to create this work because he was impressed by the way these men risked their lives on the battlefield, but also competed for their unique beauty.

Among these, this cup is the ultimate sake cup, which took about five years from conception to completion, with Date Masamune as its motif.

Masamune Date, the One-Eyed Dragon, was a kabuki performer who loved flashy costumes and decorations, including the crescent moon helmet, and was a reformer of the times. There is a death poem that Masamune is said to have uttered just before his death.

“Let’s stir up the cloudless moon of our hearts and illuminate the darkness of the floating world.”
“Just like navigating the path in pitch darkness relying on the light of the moon, I have spent my entire life simply walking along the path I believed in through the uncertain trends of the Sengoku period.”

Koga calls the modern age, where the development of SNS has made it possible for everyone to have a voice, an era of inferiority. ``If you have the will and determination to pioneer the times, you can rise to the top regardless of your origins.'' Koga continues to send encouragement to today's high-minded military commanders by creating the Cheek Armor Cup.