早速

1. Origins, structure, and basic meaning

• Structure: 早速 is read as さっそく and is an adverb for acting promptly once an opportunity, trigger, or preparation is in place.
• Basic usage: Using a new item immediately appears in 早速履いて出かける, while checking received material appears in 早速確認する.

2. Common pitfalls and similar expressions

• Prompt action after a trigger
  • It presents a flow in which a new purchase, received item, or other preceding event leads directly to the next action without delay.
• Difference from すぐ
  • すぐ broadly indicates a short time interval or nearby position, while 早速 strongly suggests promptly acting on new information, an opportunity, or a decision.