Do not delete the file immediately. You can reconstruct the cross-reference (XREF) tables using free, open-source command-line tools or trusted web services:

If your Gakushudo PDF opens but shows garbled text, squares, or missing Japanese characters, your reader lacks the necessary font resources.

What or visual issue are you seeing? (e.g., blank pages, scrambled text, "cannot open file")

Preparation for the approximately 1,500 words required for the N4 exam.

Gakushudo is a popular Japanese language learning textbook, and the N4 level is a crucial milestone for learners. However, some users have reported issues with the PDF version of the textbook, such as formatting problems, corrupted files, or difficulties with printing. In this post, we'll provide a step-by-step guide on how to fix common issues with the Gakushudo N4 PDF.

: Sentence composition and short/medium passage comprehension.

: Use web-based services like PDF4me or DeftPDF to upload and automatically fix structural errors in the file.