けっせい結成kessei
1.

The act of bringing together multiple individuals to establish an organized group with a shared purpose or objective.

2.

The process of creating an association or entity, typically for collaboration on a specific goal or initiative.

3.

The establishment of a structured organization or collective, often in response to a common interest or need.

4.

The undertaking of assembling people to form a new entity or group, often characterized by a defined mission or agenda.

Example:

ボート競技に参加する為に新チームが結成された。

さいけっせい再結成saikessei
1.

The process of bringing together previously separated elements or groups, often with the intention of revitalizing or renewing their original purpose or function.

2.

The act of a musical group or band coming together again after a period of disbandment to perform or create music anew.

3.

The re-establishment or reorganization of a partnership, team, or organization that had previously dissolved or ceased collaboration, aiming to restore its prior dynamics.