The owner, Mariko Haidani, was born and raised in Tokyo. She has unique experiences, including living in a mountain lodge on Mt. Yatsugatake and working as a cook on an uninhabited island in the Ogasawara Islands. She came across this old house in Eigenji, her husband's hometown, where she met through the mountains, and opened the restaurant to create a relaxing resting place as an extension of her daily life.

The Iiya, which also has a library and antique store, offers weekly set menus, drinks, and desserts inspired by bribery. It is also a place to visit for a moment of relaxation when you are tired of your daily routine. The evening hours at Inokoro are also attractive.