そのうちに・その内にsonouchini

1. expression, adverbbefore very long; soon; someday; one of these days; sooner or later
   「そのうちに、あなたのところにお邪魔じゃましてもいいですか」「どうぞ、どうぞ」↗

   "Do you mind if I call on you sometime?" "No, not at all."

• Synonym早晩そうばんWrittenMeans 'sooner or later' and stresses inevitability, as in 「早晩わかる」; a written, formal word rather than the conversational 「そのうちに」.
• RelatedいつかNeutralPoints to some day in the future, as in 「いつか行きたい」; the timing is vaguer than 「そのうちに」, which suggests it will happen before long.
• AntonymすぐにNeutralMeans 'right away' — the direct opposite of 「そのうちに」, which implies waiting a while rather than acting at once.
• AntonymすぐさまNeutralMeans 'immediately' — the opposite of 「そのうちに」, which points to 'before long' rather than this very moment.

Use 「そのうちに」 for 'after a while; sooner or later', as in 「そのうちに慣れる」. For an unspecified future day say 「いつか」; in formal prose 「早晩」 stresses inevitability; for 'right away' say 「すぐに」.

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

1. そう遠とおくない未来みらいに；近ちかい将来しょうらいに。
2. いつかは；やがて。