在（某时或某地），在，于

1. at (a time or place), in, on

expressions (phrases, clauses, etc.) word usually written using kana alone

在（某种情况、事情等）时，关于（某一点），说到，关于，就……而言

2. in (a situation, matter, etc.), on (a point), when it comes to, regarding, with respect to, in (terms of), as to, as for

expressions (phrases, clauses, etc.) word usually written using kana alone

代表……，根据……的授权，以……的名义

3. on the part of, under the authority of, in the name of

expressions (phrases, clauses, etc.) word usually written using kana alone