Here are the correct answers for each question based on the provided text:

6. **a lot of** - "The Japanese eat a lot of tofu, which is made from soybeans."
7. **a lot of** - "Tofu contains a lot of vegetable protein, calcium and Vitamin B."
8. **much** - "It doesn’t contain much fat, and it doesn’t provide"
9. **much** - "it doesn’t provide much calories."
10. **less** - "They cook the seafood with less cooking oil and less time."
11. **more** - "For each meal, they have more dishes on the table than us but they eat only"
12. **a little** - "but they eat only a little of everything, never stuffing themselves."
13. **a lot of** - "Japanese people also work very hard and do a lot of exercise."

So, the answers are:
6. a lot of
7. a lot of
8. much
9. much
10. less
11. more
12. a little
13. a lot of