直ちに（ただちに）

About

直ただちに is a formal adverb that indicates a verb is done "immediately" or "right away".

直ただちに tends to be used in emergency scenarios, or in dire, time-sensitive situations.

E.g. 直ただちに手術しゅじゅつが必要ひつようです。 "(They) require surgery immediately."

E.g. 違ちがう点てんを見みつけたら、直ただちに知しらせてください。 "If you find anything wrong, please tell me immediately."

In comparison to 直ただちに, すぐに is more casual/conversational in tone and doesn't include a nuance of emergency.

早速さっそく, another similar adverb, implies that an action is "long-awaited/prepared", and is often used in combination with volitional statements, statements of desire, or requests.

Summary

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  直ただちに is a formal adverb

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  直ただちに indicates a verb is done "immediately" or "right away"

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  In comparison to 直ただちに, すぐに is more casual/conversational in tone and doesn't include a nuance of emergency