Japanese Red Army member Kozo Okamoto, who received political asylum from Lebanon on Friday, left a Lebanese prison Monday night, one of his lawyers said Tuesday.
But Lebanese authorities have not confirmed whether Okamoto, 52, has actually been released from Beirut's Roumyieh prison.
On Tuesday, Lebanese government officials gave the lawyer a document certifying Okamoto's political asylum.
Okamoto may be able to live in Lebanon as a regular citizen because the certificate does not stipulate restrictions on political activities.
His supporters said they plan to take Okamoto to the home of a key ally in Beirut.
They said a relative of Masao Adachi, 60, another Red Army member, would care for Okamoto.
Chief Cabinet Secretary Mikio Aoki said earlier Tuesday in Tokyo that Japan will continue to seek his extradition.
Adachi and three other Red Army members -- Haruo Wako, 51, Mariko Yamamoto, 59, and Kazuo Tohira, 47 -- arrived in Japan on Saturday after being deported from Lebanon the day before. They were immediately taken into custody by Japanese police.
All five were arrested in Lebanon in 1997 and sentenced to three years in prison for using forged passports. Their terms expired March 7.
While his four comrades were forcibly sent to Japan, the Lebanese government granted political asylum to Okamoto because he had participated in resistance operations against Israel and had been tortured in Israeli jails.
Okamoto was sentenced to life imprisonment in Israel for taking part in a May 1972 attack at Tel Aviv's Lod airport that left 26 people dead and 76 others injured.
In 1985, however, he was released as part of a prisoner swap between Israel and Palestinian guerrillas.