|This article is about a/an actor in Kamen Rider Ex-Aid.|
Iijima graduated from Sapporo Shiroshi Elementary School. While attending Hokkaido Sapporo Shiroishi High School, he played basketball and volleyball. When he was in college, he won the Junon Super Boy Grand Prix in 2015, and landed the role of Emu Hojo.
After Ex-Aid, Iijima joined the main cast of Holiday Love, a live action drama series based on the manga of the same name. The drama also stars Yuki Yamada of Gokaiger fame and Ryutaro Okada, who would play Isamu Fuwa/Kamen Rider Vulcan in Kamen Rider Zero-One.
In 2017, his agency Oscar Promotion created a new male acting unit called Aoyama Omotesandō X, in which him, Ghost-star Shun Nishime, Zi-O-star So Okuno, Kyoryuger-star Akihisa Shiono, and GARO-star Wataru Kuriyama are amongst the members of.
- Iijima's hobbies include playing sports (swimming and basketball), driving, and playing with his pet cat.
- Before he debuted, he wanted to be a firefighter as most of his family were firefighters. That would change upon being cast in Ex-Aid.
- In a Kamen Rider × Super Sentai: Chou Super Hero Taisen press conference, it has been revealed that Iijima watched Kamen Rider Ryuki as a kid and Ryuki was his favorite rider. He also possesses great knowledge of the show.
- On August 4, 2020, it was reported by Oscar Promotion that Iijima had tested Positive for COVID-19.