In what year was the album “Pride Kakumei” released by Gintama?

In what year was the album “Pride Kakumei” released by Gintama?: The album “Pride Kakumei” was released in 2015 by Gintama, featuring 4 tracks.
What is the most successful song from the album “Pride Kakumei” by Gintama?: “Pride Kakumei (Full)” is the biggest hit from the album “Pride Kakumei” by Gintama.

Other artists of Japanese music