Alex Song "hopes to make a great impact" at Rubin Kazan after completing a season-long loan from Barcelona.
Song has been considered surplus to requirements by Luis Enrique since the latter's appointment in 2014, with the midfielder spending the last two seasons at West Ham United, and he will be managed by former Malaga boss Javi Gracia for the upcoming campaign.
"I'm very happy to come here and be a part of the project being built in Kazan," Song told the club's official YouTube channel via BBC Sport.
"The club hopes to establish itself as the biggest team in Russian football in the next four years and I hope to make a great impact towards that.
"I've played for big teams like Arsenal and Barcelona, these clubs always set high goals so I understand the targets here.
"I like the atmosphere in the squad and hopefully we can achieve something positive together."