The official So-Matome e-books (via Kindle, Kinoppy, or Google Play Books) exist for N3, N2, and N1. For N4/N5, ASK has not released legal e-books in most regions.
Even if you find one, the quality is terrible: nihongo sou matome n5 pdf portable
Without a portable PDF, this study session would be impossible. With it, you just turned dead transit time into productive learning. The official So-Matome e-books (via Kindle, Kinoppy, or
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