Wow what another fantastic thread. Thanks for the extensive reading and opinions.
Firstly I think it prudent to mention that the Japanese have rather extended lives and their diet tends to consist mostly of the following;
White rice, stewed vegetables, pickled vegetables and smaller relatively high oil fish such as Sardine and Pacific Saury. Most of this being enhanced with soy sauce. There is not a drop of olive oil anywhere on their tables, and trust me as a 3rd generation Italian American living on the pacific coast of Japan it tends to frustrate me as I am often handed a bottle of "salad oil" which is anything but made of olives. "Pfft what is this crap ?" I think to myself before demurring to the hostess.
In general the salt intake for the Japanese people is quite high, although I am not going to bother searching for a study that backs up my position as I have lived in the country for more than a decade and feel I am experienced enough to know the amounts of sodium they consume. Your standard old school breakfast is going to be a small bowl of white rice, a piece of grilled fish and a bowl of miso soup. Many a table also includes a fried egg and perhaps some pickles or related seaweed dish such as Hijiki. If you don't know what Hijiki is, do yourself a favor and take a closer look at it because its wonderful. There is also a distinct possibility that Natto will also be consumed at breakfast. If you can overcome the smell, the taste is not so terrible actually. Green tea is also popular but coffee seems to be the preferred choice of late.
Miso, Natto and Green tea are very healthy and I hope everyone here at least considers eating them on a semi regular basis.
Recently in their relative wealth and lifestyle adjustments the Japanese have switched to a Western diet. Lots of processed food, sweets and snack foods. The resulting number of obese people and those in relative ill health called "Metabo" here is profoundly disturbing. I could go on about the diet they consume traditionally but its not that relevant to the thread focusing on olive oil, suffice to say that longer life with essentially NO olive oil is possible as evidenced by the people of the Japanese archipelago. The endocrinology clinics are full of people on insulin and missing limbs because they fail to heed the doctors advice.
Relating to Olive Oil, I think it also pertinent to mention that many Italian distributors and wholesalers often blend their oils. Its somewhat frowned upon by purists but its an all too common occurrence. Indeed the wife and I were in Italy on a trip a few years ago and while sampling some local oils were told to buy it in the shop because they don't blend like the fancy folks in town. This was in a small shop in Frosinone although my relatives suggested http://www.attiliosfinefoods.com/to me for online shopping. I warn you that its not cheap and I tend to buy perhaps once a year and make due with the Italian brands at the local import shop that I am relatively convinced are blended. Spending money on a good quality olive oil is all well and good but perhaps its best to find the source of it if you are going to really get the "true" stuff.
Continuing on I would also like to point out that we should NEVER be eating oil or anything else from clear plastic bottles as they are treated with BPA or Bisphenol A. A very nasty chemical that produces a clear yet potent plastic perfect for the packing needs of 21st century distribution. BPA is not healthy and if you spend a little time researching it you will find that its a frequent additive in all kinds of processes. Please do not eat Olive oil from plastic bottles. The Mayo clinic has a blurb which does little justice to the issue http://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/expert-answers/bpa/faq-20058331
BPA is nasty for young children especially boys, which is why we have seen a BPA movement in pacifiers and other infant related products. But they spray BPA inside cans as well. I try to buy beans from the bin the old fashioned way here in our town, but the grandmothers who still have it available are retiring in ever greater numbers.