Analyzer
Sentence analysis
7Spans
Sentence
Span Details
原因
cause; origin; sourcenoun, suru verb
を
object markergrammar
調査
investigation; examination; inquiry; surveynoun, suru verb
する
light/support verb with a noun or noun-like phrasegrammar
必要
necessary; needed; essential; necessity; need; requirementna-adjective, noun
が
subject markergrammar
ある。
be; exist; have; possess; there is available; be located; be situated; be equipped with; have as a facility or feature; happen; take place; come about; be in a completed state; be left as done-> 有るgodan verb, auxiliary