InDesign Japanese Edition 15.0 or earlier
At present, the indent size depends on the attribute of the first character, so when the character with a different size or scale comes first, the indent amount changes.
Instead, I want the indent to be fixed based on the text size in the paragraph style or frame grid settings.
The attached image is the current specification.

P.S. If the first character of a paragraph has a decoration such as an underline, the decoration will also accompany the indentation. I think this is a bug.(additional.jpg)