“Since some time ago” in Japanese
Short answer
Since some time ago in Japanese is “予てから” (kanetekara). Full meaning: since some time ago, for quite a while, already.
Other ways to say “Since some time ago” in Japanese
先ほどから
sakihodokara since some time ago, for some time, for quite a while
さっきから
sakkikara since some time ago, for some time, for quite a while
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