今後|こんごkongo[0]heiban (flat)

1. noun, adverbfrom now on; hereafter
   今後こんご気きをつけなくてはなりません。↗

   You must be careful from now on.

• SynonymこれからNeutralColloquial: starting from this very moment, as in 「これから頑張る」. More casual than 「今後」.
• Synonym以降いこうWrittenWritten style; means on and after a stated point in time, as in 「三時以降」, so it needs a reference point, which 「今後」 does not.
• Synonym以後いごWrittenWritten style; means after that point or hereafter, as in 「以後気をつけます」.
• Synonym向後こうごFormalA formal, literary way to say 'hereafter', now little used; in daily life 「今後」 is the norm.
• Synonym将来しょうらいNeutralThe future at large — of a person, society or technology, as in 「将来の夢」 and 「日本の将来」; 「今後」 stresses the time from now on.
• Synonym後々あとあとNeutralMeans later on, as in 「のちのち困る」; often carries worry about trouble down the road.
• Synonymこの先このさきNeutralCan point to what lies ahead as well as to the time to come, as in 「この先もよろしく」 or 「この先どうなる」; 「今後」 is more formal and refers only to time.
• Related先々さきざきNeutralRefers to the future ahead or to the places one visits, as in 「先々のことを考える」.
• Related後々のちのちNeutralMeans later on, as in 「のちのち困る」; often carries worry about trouble down the road.
• Related未来みらいNeutralRefers to the future itself, as in 「未来の社会」, and spans a far longer stretch of time than 「今後」.
• Related先行きさきゆきNeutralSpeaks of prospects — how things are headed, as in 「景気の先行き」; common in talk about the economy.
• RelatedフューチャーCasualColloquial loanword for the future, or for futures trading; mostly seen in song titles and ads.
• Related末々すえずえWrittenWritten style; reaches into the far future or refers to descendants, a longer span than 「今後」.
• Related自今じこんFormalA literary way to say 'from now on', rarely used today; formal settings generally keep 「今後」.
• Related後の世のちのよWrittenWritten style for later ages, posterity or the world after death, with an old-fashioned ring; everyday speech says 「将来」.
• Antonym過去かこNeutralThe opposite of 「今後」: the past, as in 「過去を振り返る」.
• Antonym以前いぜんNeutralAlso opposite to 「今後」: an earlier time, before now, as in 「以前住んでいた所」.
• AntonymこれまでNeutralAlso opposite to 「今後」: up to now, so far, as in 「これまでの経緯」.

Default to 「今後」 for from now on. In speech, 「これから」; for on and after a set time, 「以降」; for after that, 「以後」; for the future, 「将来」; for prospects, 「先行き」. The opposites are 「過去」 and 「これまで」.

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

1. 今いまより後あとの時間じかん。
2. 今いまより後あとの事情じじょう。
3. 今いまより後あとに。今いまから将来しょうらいに亘わたって。