The father of Lucie Blackman has told of his distress at hearing his daughter's diaries revealed in court.
Lucie Blackman's body was found seven months after her death
Extracts have been read out by Japanese businessman Joji Obara who denies abduction, rape and manslaughter of the 21-year-old hostess from Kent.
Tim Blackman, 52, of the Isle of Wight, who is in Tokyo for the trial, said he would be making a written representation to the judge on Friday.
Miss Blackman's dismembered body was found in a cave outside Tokyo in 2001.
Speaking after Wednesday's court proceedings, Mr Blackman said: "He was reading out excerpts from Lucie's personal diaries and putting his interpretation on them, creating this image that Lucie was in an unstable mental state, depressed, suicidal and taking drugs.
"We found it very gruelling and upsetting that he had access to her personal diaries."
Mr Blackman began the desperate search to find his daughter in Japan
On Wednesday, Mr Obara told the court there was no DNA evidence that linked him with the crime scene.
He said that Miss Blackman suffered from mental illness and took drugs, using extracts from her diaries to back his case.
The former flight attendant from Sevenoaks was working as a bar hostess at a nightclub in the Roppongi district of Tokyo when she vanished in July 2000.
Her body was found in Miura, a remote and secluded fishing village, after a seven-month search.
Mr Obara, 52, who went on trial in November 2003 is accused of a number of attacks on women, including abduction of Miss Blackman, rape resulting in death, and disposal of her body.
The court is due to hear a second day of evidence from Mr Obara on Friday.