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.

Sources say the suspect in last year's arson attack on a Kyoto Animation studio has recovered enough from his burns to speak clearly. Police plan to arrest him when he is well enough to enter detention.

The attack in Kyoto on July 18 killed 36 people, all employees of Kyoto Animation. A further 33 employees were injured. Two of them are still receiving treatment in hospital.