在，于

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

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

在(一种情况、一件事等)中、在(一点上)、当涉及到、关于、就(方面)而言、至于、至于

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

由以下方面、根据以下方面的授权、以以下方面的名义实施

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

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