TV Tropes is unreliable on Japanese culture. While it's fond of Japanese media, connection demographics show that Japanese editors are disproportionately rare (even after taking the language barrier into account); almost all the contributors to a page like that are likely to be language students or English-speaking Japanophiles, few of whom have any substantial experience with the language or culture in the wild. This introduces quite a bit of noise; for example, the site's had problems in the past with people reading meanings into Japanese words that don't exist or that are much more specific than they are in the wild.

I don't know myself whether the ancestor is accurate, but it'd be wise to take it with a grain of salt.