Tetsuya Yamagami was arrested on the spot in July 2022 after fatally firing at Abe with a homemade gun while he was delivering a campaign speech in the western city of Nara.
"Anything ever happens, the whole country is going to get blown up,” Trump said and added, "I would absolutely hit them so hard. But I have very firm instructions.”
The accident occurred just two days after a high-speed train collision and derailment near Adamuz in the southern Córdoba province that killed 42 people.
The United States has sent more than 60 invitations to heads of state to join US President Donald Trump's Board of Peace, with only some countries confirming that their leaders will join.
The girl, who has not been officially named, suffered only a minor head wound. The family had been returning to their home in Aljaraque, on the Atlantic coast near Huelva, according to Spanish media.
"We know that the Americans are stronger than us," Danish MP Rasumus Jarlov told CNN, "but it is our duty to defend our land and our people."
Rescuers continue to look under the wreckage of twisted train cars to locate victims of the collision.
The government did not mention a particular age limit, but said it was exploring a ban "for children under a certain age."
"If you're thinking about going for a swim, think of going to a local pool because at this stage, we're advising that beaches are unsafe," said Steven Pearce, executive chief of Surf Life Saving NSW.
"Shockingly, our 'brilliant' NATO Ally, the UK, is planning to give away the Island of Diego Garcia, the site of a vital US Military Base, to Mauritius, and to do so FOR NO REASON," Trump said.
China has been invited to join US President Donald Trump's Board of Peace initiative aimed at resolving global conflicts.
