Man sentenced to death for Kyoto Animation attack | NHK WORLD-JAPAN News
www3.nhk.or.jp
A Japanese court has sentenced a man to death for the arson attack that killed 36 employees at a famous animation studio in Kyoto. The number of deaths is the largest on record in a criminal trial in the country in more than three decades.

I linked NHK, basically the Japanese news source that also publishes in English. However, if you want a lot more context from the case, you can read the Crunchyroll article here that has a lot of background for the case.