EXCLUSIVE: 47 Ronin and The Wolverine star Hiroyuki Sanada has been tapped to join Ian McKellen in A Slight Trick of the Mind, the drama about an aging Sherlock Holmes that Bill Condon is directing this summer in London. Sanada will play Umezaki, a Prickly Ash plant enthusiast who Holmes (McKellen) visits in Japan. He joins McKellen and Laura Linney as Holmes’ housekeeper, who with her young son is regaled with the tale of the unsolved mystery that ended Holmes’ career.

Script was adapted by Jeffrey Hatcher (The Duchess, Casanova, Stage Beauty) from Mitch Cullin’s novel. Anne Carey is producing for her Archer Gray Productions. Exec producers are See-Saw Films, Icon/AI Film’s Aviv Giladi, and Len Blavatnik alongside Archer Gray’s Amy Nauiokas and BBC Films’ Christine Langan.

Sanada starred recently on the big screen opposite Colin Firth in The Railway Man and will be seen this month in the new Steven Spielberg-exec produced sci fi series Extant, which debuts tonight on CBS. He’s repped by CAA and Lighthouse Entertainment.