Several online platforms offer downloadable PDFs specifically designed for Bengali speakers:

"JLPT N4 vocabulary with bangla meaning" filetype:pdf "N4 vocab bangla" site:drive.google.com জাপানি এন৪ শব্দভান্ডার পিডিএফ

The N4 level is one of the five levels of the Japanese Language Proficiency Test (JLPT), which is a standardized test to evaluate the proficiency of non-native Japanese speakers. The N4 level is considered intermediate, and it requires a vocabulary of around 3,000-4,000 words. At this level, learners are expected to have a good understanding of grammar, vocabulary, and kanji characters.