noun
Refers to a collection of items gathered or treated as one unit. Often used with にする or になる to mean 'to bundle together' or 'to be grouped together'.
書類をひとまとめにして机の上に置いた。
I bundled the documents together and put them on the desk.
これらの問題はひとまとめに扱うべきだ。
These issues should be dealt with as a group.