The Catalan club said they had paid €1.1 million for the 20-year-old and assigned him to their reserve team, which plays in the third-tier Spanish Segunda B.
Barcelona said Abe had signed a four-year contract with a €40 million buyout clause which would rise to €100 million if he is promoted to the first team.
He "is considered to be Japanese football's big promise ahead of the 2020 Tokyo Olympic Games," Barca said on their website.
Abe, who made his international debut in the Copa America last month, can play anywhere across the front line, but "has predominantly been used on the left flank," the Catalans said.
He was the J-League's young player of the year in 2018 and started both legs as Kashima won the Asian Champions League title in the same season. He made 79 appearances for the Antlers over the last three Read More
