From February 2013 to July, he appeared in the Fuji TV series Terrace House under the nickname of Ōji (王子).
[5][6] After graduating from the same programme, Iwanaga appeared on the Yakyū-ken Corner of the broadcast Mecha-Mecha Iketeru!
[7] In November of the same year, he received membership of Japan Mensa, an organization of people with IQ with the world's top 2%.
[8] Broadcast on the same day of the same month Iwanaga appeared as a member of the "Ikemen Intelli Army" on Otameshika'!
[9] March 2014 After Men's Non-no exclusive model graduation (magazine publication up to the June issue) appears as a free model Baila, JJ, and other women's magazines.