If you find a PDF claiming to be "official," look for these signs:
Don't start with the dialogues. Daichi lists vocabulary by part of speech. Use a flashcard app (like Anki) to memorize the nouns, verbs (ます form), and adjectives for the lesson. If you have the translation supplement PDF, refer to it here.
Look for the "NIHONGO LISTENING" app or specific Daichi companion apps. While these often don't contain the full textbook, they include the listening scripts and vocabulary audio, which is 80% of the value of the PDF.
The demand for a digital copy is not surprising. Here are the top three reasons students hunt for this specific PDF:
This is where Daichi shines. The CD (or audio file) contains drills. Listen to the drill, pause, and answer. If you are using a scanned PDF, you might miss these audio tracks. You must source the audio legally via the Japan Foundation’s official site or the book’s CD.
Physical copies of Daichi are expensive, ranging from ¥2,500 to ¥3,500 (~$18–$25 USD) for the main text, plus another ¥2,000 for the translation book. Shipping to countries outside Japan can double that cost. A free PDF seems instantly appealing.
If you want, I can:
For students utilizing the PDF, understanding the structure of the volume is helpful. "Nihongo Shokyu 1" generally covers the basics required to pass the JLPT N5 (Japanese Language Proficiency Test, Level 5). Topics typically include: