Former Pakistani Prime Minister Benazir Bhutto's assassination has stunned people around the world, including in Tokyo, where scores have been visiting the Pakistani ambassador's residence to sign a book of condolence.

The mourners include Japanese government officials and citizens, who have come "to express their sorrow and grief," Pakistani Ambassador Kamran Niaz said at his residence in Shoto, Shibuya Ward.

Bhutto was killed in a suicide attack during a political gathering Thursday in Rawalpindi, Pakistan.

Among those signing the condolence book Saturday was Shun Imaizumi, chairman of The Japan-Pakistan Association, who voiced regret for the level of terrorism that has befallen Pakistan.

"The act of killing other people because they don't share the same ideas . . . we really must be against that," said Imaizumi, who met Bhutto several times, including when she visited Japan shortly after becoming prime minister.

Ambassador Niaz also expressed his anger, saying when this kind of tragedy happens, "you can only feel sorry, regretful, shocked, surprised. You also feel angry at the senseless act of killing innocent people."