あれから

adverb

since then; after that

Refers to the time after a previously mentioned event, often implying a change or continuation from that point.

• あれからずっと彼かれに会あっていない。

  I haven't seen him since then.

• あれから状じょう況きょうは大おおきく変かわった。

  The situation has changed a lot since then.