Born in Tsurugashima, Saitama, Hasegawa joined Yokohama F. Marinos' youth setup in 2004, aged 16, after starting it out at Sakado Diplomats.

[2] In November 2006 he was promoted to the main squad ahead of the following campaign[3] and made his professional debut on 3 March 2007, in a 1–0 home win against Ventforet Kofu; however, he struggled severely with injuries during the year.

On 6 June 2008, Hasegawa signed a professional deal with Marinos,[4] and scored his first senior goal on 29 November, netting the last in a 2–0 home success against Tokyo Verdy.

[6] He was mainly used as a defensive midfielder by manager Ranko Popović and scored five goals in 2013; on 29 December 2013 he extended his contract with the club.

In December 2012 he got called up to the main squad by coach Alberto Zaccheroni for a friendly against Azerbaijan, but remained unused in the 2–0 win.