かつ・且つ・且katsu[1]atamadaka (head-high)

1. conjunction, adverband; moreover; besides; as well as; and on top of that; at the same time
   彼かれは作家さっかでもあり、かつまた政治家せいじかでもある。↗

   He is a writer and a statesman.

• SynonymまたNeutralMeans 'again' or 'also', as in 「また会いましょう」; very common in speech and covers many senses, so it is broader than 「且つ」.
• Synonymその上そのうえNeutralMeans 'what's more, on top of that', as in 「安くてその上おいしい」; common in everyday speech, where 「且つ」 would sound stiff.
• SynonymそれにNeutralColloquial 'besides, and another thing', as in 「それに時間もない」; often adds a reason or extra point rather than linking qualities.
• SynonymなおかつWrittenWritten word meaning 'moreover, and still', as in 「なおかつ優勝した」; adds emphasis to the degree, stronger than plain 「且つ」.
• Synonym他にほかにNeutralPoints to other things or options, as in 「他に何かありますか」; about separate alternatives, not linking qualities like 「且つ」.
• Synonym合わせてあわせてNeutralTotals things up or does them at the same time, as in 「合わせてお願いします」; leans toward combined, accompanying action, while 「且つ」 links coexisting qualities.
• Synonymかてて加えてかててくわえてWrittenA written set phrase meaning 'to make matters worse'; it piles one bad thing on another, unlike the neutral linking of 「且つ」.
• SynonymなおまたWrittenWritten 'furthermore, what is more'; it typically turns up in letters, introducing an extra matter to add on, whereas 「且つ」 is common in ordinary written prose.
• Synonym加えてくわえてNeutralA written conjunction meaning 'in addition'; suits formal explanation, while 「且つ」 joins coexisting states within a sentence.
• RelatedあまつさえWrittenWritten 'to make matters worse', as in 「あまつさえ雨まで降ってきた」; adds something bad on top, unlike neutral 「且つ」.

In writing, use 「且つ」 to link two coexisting qualities or actions, as in 「迅速且つ正確に」. In speech, add a point with 「それに」 or 「その上」. In written prose, 「なおかつ」 adds emphasis and 「あまつさえ」 piles one misfortune on another.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. （かつ）ある事物じぶつが並行へいこうして起おこったり存在そんざいしていることを表あらわす。ならびに。同時どうじに。
2. （かつ）ある状態じょうたいに、別べつの状態じょうたいが加くわわる状況じょうきょうを表あらわす。かさねて。くわえて。