Japanese prosecutors have indicted a 42-year-old man over an arson attack at an animation studio in Kyoto.

The fire at the Kyoto Animation studio in July last year killed 36 people and injured 32.

Japanese prosecutors are expected to indict the suspect in the deadly arson attack on Kyoto Animation last year, following his detention for psychiatric analysis.

Aoba Shinji is accused of setting fire to the studio in the city of Kyoto, western Japan, killing 36 people and injuring 33 in July last year.

Saturday marks exactly one year since the deadly arson attack at a studio of Kyoto Animation in Kyoto, Japan.

The blaze on July 18 last year left 36 employees dead and 33 others injured. It was the worst mass-killing in Japan in about three decades.

Workers have finished demolishing a Kyoto Animation studio that was damaged in a deadly arson attack in July last year.

The blaze claimed the lives of 36 employees and wounded 33 others.