Yokoyama Kenji never did ED before, only SB.
Full staff
661
Script: Tanaka Hitoshi
Storyboard: Otsuka Takashi
Episode director: Ito Satoshi (new)
Animation director: Hisada Kazuya
662
Script: Uesaka Hirohiko
Storyboard: Hosoda Masahiro
Episode director: Hosoda Masahiro
Animation director: Yokoyama Kenji
663
Script: Nakayama Tomohiro
Storyboard: Yokoyama Kenji
Episode director: Endo Tetsuya
Animation director: Narasaki Asako
664
Script: Yonemura Shoji
Storyboard: Ueda Yoshihiro
Episode director: Ueda Yoshihiro
Animation director: Takagi Masayuki
Next titles (rough translation)
[09/14] 661: Showdown of Warlords · Law vs Doflamingo
[09/21] 662: Two Great Forces Face-off! Straw Hat and the Heavenly Demon
[09/28] 663: Luffy, Startled · The Man Who Inherits Ace’s Will
[10/05] 664: Start Operation SOP · Charge, Usoland