Thank you for the information.
I think you are correct. It has been a long while since I used the blood type diet.
Do you know something of the variety of natto growth media? Which beans have better K2 production, with decrease in antinutrients? Can lentils or peanuts be used?
I'm always looking for the keys to the puzzles.
I've used the blood type information for over 10 years now. The keys are to be aware of body pH and your parents blood types. You'll notice people posting against the diet never put up the pH/parent information. :)
As for correct beans for natto, I'd check wildfermentation.com as a possible source. Not sure if they cover it, but the process is a bacterial fermentation. I guess you could try lentils and peanuts yourself, not sure.