Ideguchi was born in Fukuoka on August 23, 1996. He joined J1 League club Gamba Osaka from their youth team in 2014. He played many matches as central midfielder from 2016. He was selected "Best Young Player award" in 2016 and Best Eleven in 2017. In January 2018, he moved to Spanish Segunda División club Cultural Leonesa. In August 2018, he moved to German 2. Bundesliga club Greuther Fürth. However he could not play many matches at both clubs. In August 2019, he returned to Gamba Osaka.