改宗

1. Origins, structure, and basic meaning

• Structure: 改宗, read かいしゅう, denotes the act or decision of changing from one religion to another.
• Basic usage: It describes a fictional character changing religion upon marriage and a family accepting that decision.

2. Common pitfalls and similar expressions

• Change of religion, not degree of belief
  • It means changing from one religion to another, not simply becoming more devout.