I would not be so quick to buy that reason either. :scratch
Miyazki and his family may believe that abstinence from alcohol has led to his longevity...but there are other factors that are considerably more important. Genetics, stress, environmental condtions, lifestyle, diet and exercise most likely are significantly more important to his ability to reach the ripe old age of 111.
My grandmoother takes a shot of rum (she thinks it helps the appetite) before supper and she is well into her eighties - strong and healthy. She has led a very low stress life, she is very active (does tai chi and stretching each day) and eats a well balanced healthy diet (no red meat for her). I wouldn't be suprised if she goes another 20 years...
This URL provides a different point of view on alcohol use and health with many medical references:
http://www.hkam.org.hk/temp/wine_health.html Stupid cliches are sometimes true: There are always two sides to every story and what is right for one person may not be right for another.