After growing through Júbilo Iwata youth ranks, Hiroki Itō was promoted to the first team in 2018.[4] He debuted as a pro in March 2018 in J. League Cup, and would soon make his first appearance in J1 League in August 2018.[5] In 2019, he was loaned out to Nagoya Grampus, where he made nine appearances in all competitions.[6]
VfB Stuttgart
In June 2021, Itō joined Bundesliga club VfB Stuttgart on loan, and was assigned to play for the second team in the Regionalliga Südwest.[7] However, he was instantly promoted to the first team by coach Pellegrino Matarazzo, and started his first match in a 6–0 away win against BFC Dynamo in the DFB-Pokal.[6] Afterwards that year, on 26 November, he scored his first Bundesliga goal in a 2–1 win over Mainz.[8] On 20 May 2022, VfB Stuttgart exercised a purchase option which tied Itō to the club with a contract until June 2025.[9]
In August 2023, he extended his contract with Stuttgart until June 2027.[10] In the 2023–24 season, he played a crucial role in his club's runner-up finish and qualification to the Champions League.[11]
Bayern Munich
On 13 June 2024, Itō signed for fellow Bundesliga club Bayern Munich until 2028,[12] after they had triggered his release clause of an estimated €30 million.[13]
Itō made his debut for the senior Japan national team on 2 June 2022, during a 4–1 friendly win over Paraguay.[17] Later that year, on 1 November, he was selected in 26-man squad for the 2022 FIFA World Cup in Qatar.[18]