Merge deck with external list

I have a Japanese deck that I am building and using for more than 10 years. The deck has reached a significant size, and I would like to enrich it through external lists (like the list of N1 vocabulary, or the list of core 10k words).

Is there a possibility to make a joint between my deck and the external list, allowing me to add new cards with words that are in the external list and not in my deck ? I would then fill in the other fields (translation, example sentences,…) by myself. Thanks.

You can import that list as a text/CSV file, and have the import skip duplicate notes (same note type, same first field). Text Files - Anki Manual