The Nippon Ham Fighters and Yakult Swallows agreed on a trade. The Fighters will send twenty-seven-year-old Hirotoshi Takanashi and twenty-one-year-old Kengo Ota to the Swallows for twenty-nine-year-old Ryo Akiyoshi and twenty-seven-year-old Ryota Yachi.
[UPDATE 12/18 @ 10:44am]
The Fighters held a press conference for Akiyoshi and Yachi on December 17. They were assigned the uniform numbers 39 and 32, respectively.
Source: Nippon Ham 12/17/2018
[UPDATE 12/19 @ 1:09am]
The Swallows held a press conference for Takanashi and Ota on December 18. Takanashi was assigned the uniform number 14, Ota the number 46.
Source: Yakult 12/18/2018