The news was confirmed on the official site of the Reds.
The 24-year-old Salzburg winger impressed with his performance and the Merseyside club got the be to one to sign him.
Liverpool paid £ 7m for the Japanese footballer.
The talented Japanese underwent medical checkups and negotiated his personal terms on Wednesday and now becomes the first Merseyside purchase in the winter transfer window since Virgil van Dijk joined from Southampton 2 years ago.
It is said that Minamino's performance against Liverpool in the Champions League was the reason for the deal.
The winger told his new club's website: "It is a dream come true for me to be a Liverpool player. It was my goal to play in the Premier League, for me this is the best championship in the world. Liverpool play at an extremely high level and you can feel that they are the champions of Europe. I am very happy that I will be able to play in this team. My goal is to win the Premier League and the Champions League and contribute to the success of the team. "
Minamino played for Salzburg for 5 years and scored 42 goals and made 20 assists.
Category: Football news
Tags: Premier League, Liverpool, Jürgen Klopp