便利とはいえ使い方には注意が必要だ

N5 便利 benri convenient N5 はい hai yes N5 方 kata person, way, direction N4 注意 chuui attention, caution, warning N4 必要 hitsuyou necessary, need

N3 便 ben, bin / tayo.ri convenience, facility, excrement N3 利 ri / ki.ku profit, advantage, benefit N4 使 shi / tsuka.u, tsuka.i, -tsuka.i, -zuka.i use, send on a mission, order N4 方 hou / kata, -kata, -gata direction, person, alternative N4 注 chuu / soso.gu, sa.su, tsu.gu pour, irrigate, shed (tears) N4 意 i idea, mind, heart N3 必 hitsu / kanara.zu invariably, certain, inevitable N3 要 you / i.ru, kaname need, main point, essence

N5 〜が ga Marks the grammatical subject, highlights new information, can also show slight contrast in some sentences N5 〜に ni Indicates destination, target, arrival point, specific time, or person receiving an action N5 〜と to Indicates company, quotation, natural condition, complete list, or direct connection between elements N5 〜は wa Marks the topic of the sentence, indicates what the sentence is about, can contrast with another element, organizes main information