秋葉原 あきはばら 差別 さべつ殺傷 さっしょう事件 じけんであれば
akihabaramusabetsusasshōjikendeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 秋葉原無差別殺傷事件

1. If the Akihabara mass stabbing incident…; If there were an Akihabara mass stabbing incident…

Ba Conditional