- Izumi works in his family bakery, Iory after school.
- He wishes to continue the family business, especially since he enjoys working there.
- Izumi is very good at tongue twisters.
- Izumi can't pronounce the words like "暖かい atatakai" (meaning warm), "肩たたき katatataki" (meaning shoulder massage), "山吹色 yamabuki-iro" (meaning bright yellow), and "座敷童子 zashiki warashi" (a childlike guardian spirit), instead says "akkatai", "kakatataki", "mamabuki-iro", and "dashiki zarashi".
- He had 10 piercings in total; two of which closed, one on the lip and one on the tongue. He still has four piercings on each ear.
- He is afraid of horror movies.
- He doesn't like tomato peel.
- Izumi has a full mark in Health, which, he usually uses against Tooru Ishikawa.
- Izumi won first place in the Horimiya character popularity contest on November 17th
- He is an only child.
"Everyone starts from zero. If you mess up, just try it. Figure out why, and try again.”
“Under such circumstances, you shouldn’t say “where are you going” but rather “don’t go.”
“You can have the bad days so you can love the good days even more.”