irai いらい 以来

Conjunction meaning: since

1. After noun expressing a past point in time
先月以来雨が降っていません。
Sengetsu irai ame ga futte imasen.
It has not rained since last month.

2. After te-form of verb
私は教師になって以来五年になります。
Watashi wa kyoushi ni natte irai go nen ni narimasu.
It is five years since I became a teacher.

-> See also: igo, ikou, kara