至近要因
Kanji
Readings: シ、 いた.る
Meanings: climax, arrive, proceed, reach, attain, result in
Readings: キン、 コン、 ちか.い
Meanings: near, early, akin, tantamount
Readings: ヨウ、 い.る、 かなめ
Meanings: need, main point, essence, pivot, key to
Readings: イン、 よ.る、 ちな.む
Meanings: cause, factor, be associated with, depend on, be limited to