余波

1. Origins, structure, and basic meaning

• Structure: 余波(よは) means waves remaining after a major disturbance or effects spreading in the wake of an event.
• Basic usage: The examples concern waves remaining after a storm and the repercussions of a policy change.

2. Common pitfalls and similar expressions

• The following effects compared with 影響
  • 影響(えいきょう) broadly refers to one thing affecting another. 余波 emphasizes effects originating in a central event and extending afterward or outward.