Astafyev Kingdom

 (アスタフィエフ王国, Asutafiefu ōkoku) is a defunct kingdom 600 years ago from the time Mukoda Tsuyoshi was summoned.

History
The kingdom was also known to have done the ceremony of Hero Summoning to which they bave summoned a man colloquially called Kazu. He was skeptical of the country that summoned him so he rewrote his status and escape the kingdom.