* Club domestic league appearances and goalsas of 19 November 2025
Atomu Tanaka (田中 亜土夢, Tanaka Atomu; born 4 October 1987), nicknamed Atom, is a Japanese professional footballer who plays as a midfielder for Veikkausliiga club KTP.
Tanaka was educated at and played for Maebashi Ikuei High School in Maebashi, Gunma. While he was a high school student, he was registered as a J.League specially-designated player by Albirex Niigata.[3] It meant that he was eligible to play and train with Albirex Niigata, while he was still eligible to play for his high school football club. He played two league games for Albirex in the 2005 season. He made his debut on 27 November 2005 in a J1 League away match against Nagoya Grampus Eight.[4]
After graduating from his high school in 2006, he officially signed with Albirex Niigata. His first appearance as a professional player came on 5 March 2006 in a league match against Kawasaki Frontale.[5] His first professional goal came on 8 April 2006 in a league match against Ventforet Kofu.[6]
In October 2015 of the same year, HJK exercised their option of keeping Tanaka under contract for the 2016 season.[7] Tanaka was voted as a best eleven member in 2015 and 2016 in the Finnish League.[8]
On 25 October 2017, it was announced that Tanaka would leave HJK at the end of the 2017 season.[9]
In the 2023 season Atom surpassed the 200th match mark in HJK. On 28 November 2023, Atom extended his contract with HJK, signing a new deal for the 2024 season,[12] which will be his eight season with the club in total. In December 2024, it was announced that Tanaka would leave HJK after the 2024 season.[13]
