Musa has been a free agent since leaving Al Nassr last year.
The 28-year-old has returned to his boyhood club for a second stint after failing to seal a move to West Brom in the January transfer window.
Kano Pillars announced his signing on their website.
“Super Eagles captain, Ahmed Musa, has sensationally returned to Kano Pillars FC for the remainder of the 2020/21 Nigeria Professional Football League season (NPFL),” a statement from the Kano Pillars website read.
Ahmed Musa will be unveiled by Kano State Governor Abdulahi Umar Ganduje before the start of the league second stanza.
Musa started his professional career at Kano Pillars before joining VVV Venlo in 2010 after winning the NPFL top scorer award in the same year.