Look for Essential Ohsawa: From Food to Health, Happiness to Freedom (edited by Carl Ferré). This book gathers the most critical chapters from all of Ohsawa’s rare works into one modern volume. While it isn't a free PDF, it is affordable and available on Amazon or AbeBooks.
About PDFs and accessing Ohsawa’s books
Finding his original works in digital formats—such as PDF or EPUB—is a great way to access these timeless insights. Where to Find George Ohsawa Books in PDF
Many of Ohsawa’s lectures were taped in the 1960s in San Francisco. These are sometimes easier to find than PDFs. Listening to Ohsawa speak with his thick Japanese accent explaining "yangizing the blood" provides a level of nuance that text sometimes misses.
: A popular book on Japanese physiognomy (face reading) that predicts health outcomes based on eye characteristics and discusses how a macrobiotic diet can improve one's condition.
If you’d like, I can help you identify specific titles, check their copyright status, or locate legitimate purchase/borrowing links.
For out-of-print editions or historical texts that may have entered the public domain or are preserved for academic research, you can check major digital repositories: