beginning of a document

improvement, an action taken to improve / improvement, a spontaneous change for the better

(transitive) to improve, to make better / (intransitive) for something to improve on its own

betterment, improvement, amelioration

report, paper

needed, necessary

need, necessity

"report manga" (manga that illustrates the experience of something)

a scouting report (sports)

necessity (quality or state of being necessary, unavoidable, or absolutely requisite)