Japan has no plans to extradite Alberto Fujimori, the former president of Peru, to his home country to face charges, Tokyo has said.
Mr Fujimori is the son of Japanese immigrants to Peru
The international law enforcement agency Interpol passed a Peruvian request that Mr Fujimori be arrested to Japan at the weekend.
Peru is seeking to prosecute Mr Fujimori on murder, kidnapping and embezzlement charges.
Mr Fujimori, who is of Japanese extraction, fled to Japan in November 2000 amid a corruption and bribery scandal, and took Japanese citizenship shortly afterwards.
Under Japanese law, the country does not extradite its citizens. Neither does it have an extradition treaty with Peru.
"We have absolutely no plan to take any sort of action against Mr Fujimori at this moment," Foreign Ministry spokesman Hatsuhisa Takashima said.
He said the ministry could not confirm it had received the Interpol request.
Mr Fujimori is seen as a hero in Japan for his role in freeing hostages held at the Japanese embassy in Lima six years ago.
But the BBC's Latin America correspondent Peter Greste says Tokyo will be under considerable pressure to hand Mr Fujimori over.
The former president refused to meet the head of Peru's Truth and Reconciliation Commission, which is probing atrocities committed during his decade in office, when he came to Tokyo to interview him.
Mr Fujimori described the inquiry as a "circus" and said it was trying to persecute him.
Commission chairman Salomon Lerner countered by saying that Mr Fujimori's refusal to meet him was an insult to the 30,000 people who had lost their lives during 20 years of civil conflict.
Charges against the ex-president relate to:
A 1991 massacre in which an army "death squad" allegedly killed 15 people at a barbecue in a poor Lima neighbourhood
- A 1992 massacre in which nine students and a professor with suspected leftist links were killed
Peruvian Justice Minister Fausto Alvarado said that Interpol had communicated Lima's request for Mr Fujimori on Saturday.
He said it should be enforceable anywhere in
the world because the charges of homicide, injuries and kidnapping it featured amounted to crimes against humanity.
Germany, Costa Rica, Italy, Spain and other countries recently said they would detain Mr Fujimori if he attempted to enter their territories.
Peru said last week it would formally ask Japan for Mr Fujimori's extradition by June or July.