秋葉原 あきはばら とう 事件 じけんであれば
akihabaratōrimajikendeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 秋葉原通り魔事件

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

Ba Conditional