Ryuji Kimura, a 24-year-old man, has been charged with attempted murder for throwing a pipe bomb at Japanese Prime Minister Fumio Kishida during a campaign event in western Japan in April.
Kishida was unharmed, and Kimura was arrested at the scene.
The incident occurred less than a year after former leader Shinzo Abe was assassinated on the campaign trail.
According to AFP, Kimura was indicted on Wednesday
A search of Kimura’s home revealed suspected gunpowder, pipe-like objects, and tools.
Before his indictment, Kimura has remained silent since his arrest and reportedly underwent psychiatric evaluation for about three months before being charged.
He had previously filed a lawsuit against the government over the country’s minimum age for running in elections.