A four-character phrase meaning the original home/originator — the authentic source or birthplace of something (e.g., a family branch or tradition).
この祭りは当地が本家本元とされ、毎年多くの人が訪れる。
This town is considered the original home of the festival, and many people visit every year.
そこの店は伝統の本家本元として知られている。
That shop is known as the original, authentic establishment of the tradition.
本家本元の証しとして、古い文書が保管されている。
As proof of being the original source, old documents are kept.