07/29/2008 AT 07:40 AM EDT
Christian Bale was in Tokyo Tuesday to chat about The Dark Knight
. But the actor continued to keep quiet about his recent London arrest
The actor was booked by police last week, following reports that his mother and sister had accused him of assault. During a press conference at Tokyo's Grand Hyatt, Bale would only say, "It's a private matter."
Sitting alongside Maggie Gyllenhaal in a long-sleeved black shirt and dark navy pants, the Batman star looked uncomfortable as he scanned the crowd of reporters, eyebrows furrowed.
He was equally unforthcoming the night before, when he refused to answer questions about his arrest at the Japanese premiere of The Dark Knight
. (That followed a recent event
in Barcelona, Spain, when Bale declined to comment, calling the incident "deeply personal.")
Bale – who has denied the allegations
– has not been charged with any crime. He is due back
at London's Belgravia police station in September.
But the actor's legal complications didn't stop him from praising the work of costar Heath Ledger
After saying "ohayo gozaimasu" (Japanese for "good morning"), the 34-year-old spoke about the first scene he filmed with the late actor – an intense interrogation between Batman and Ledger's The Joker.
"Heath played that beautifully," Bale said. "I enjoyed very much our first scene together ... because it was the first time I got to see what Heath was really going to do .... Also, you could see how much he got [by] playing this character. He really got satisfaction out of it."
Reporting by COCO MASTERS