ところでこの件は注意する必要がある。

ところでこの件は注意する必要がある。

This case requires watching, by the way.

ところでこの件(けん)は注意(ちゅうい)する必要(ひつよう)がある。

Tokorode kono ken wa chūisuru hitsuyō ga aru.

所で (ところで)

by the way; incidentally; even if; no matter (who, what, when, where, why, how)

此の (この)

this (something or someone close to the speaker (including the speaker), or ideas expressed by the speaker)

件 (けん)

matter; case; item; affair; subject

は (は)

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

注意 (ちゅうい)

caution; being careful; attention (heed); warning; advice

必要 (ひつよう)

necessary; needed; essential; indispensable; necessity; need; requirement

が (が)

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

有る (ある)

to be (usu. of inanimate objects); to exist; to live; to have; to be located; to be equipped with; to happen; to come about

Readings: ケン、くだん

Meanings: affair, case, matter, item

Readings: チュウ、そそ.ぐ、さ.す、つ.ぐ

Meanings: pour, irrigate, shed (tears), flow into, concentrate on, notes, comment, annotate

Reading: イ

Meanings: idea, mind, heart, taste, thought, desire, care, liking

Readings: ヒツ、かなら.ず

Meanings: invariably, certain, inevitable

Readings: ヨウ、い.る、かなめ

Meanings: need, main point, essence, pivot, key to