One of Koga's most popular pieces, Hooyoroi Hai, uses the motif of the unusual helmets of warlords from the Sengoku period to express the way of life and spirit of people.

``Today's era is like an era of subjugation,'' says Koga.
With the development of social networking sites and the ability for everyone to have a say, we have entered an era in which people can aim higher than their origins or the area in which they were born and raised, as long as they have the will and courage to speak out. Within this worldview, Cheekyori Sakazuki is a work that uses the unusual helmets of Sengoku warlords as motifs to express people's way of life and spirit. It is also a shout out to the aspiring military commanders living in today's world.

This cup is made in the image of Nobunaga. While Nobunaga is known as a man with strong charisma, he was also a man who displayed cruelty and killed many people in the name of unifying the country. It is said to be shaped like a skull and is an object of awe, with many anecdotes about it being like a god of death.

Also pay attention to the unique color expression created by the porcelain glaze, which is a material that never mixes, gold and bronze.