Rather than just reading a PDF, import the data into a Spaced Repetition System (SRS) like Anki to ensure the words move into your long-term memory. for one of these levels, or perhaps a guide on how to import these lists into a study app?
The 6000 most common words are frequently referred to as the "iKnow! Core 6000." This list is curated based on frequency analysis of modern Japanese media, covering approximately 90-95% of daily conversational Japanese and standard written content. 6000 most common japanese words pdf best