Curious Personalities are said from blood types

A several years ago, I watched a Japanese drama which main actors plays as different blood types characters in romantic short story; however, they are named similarly. Now, I knew why that drama was filmed.

In " Japan and blood types; Does it determine personality?", Ruth Evens reports that Japanese have been influenced their society by personalities interpreted from blood types since the beginning of the discovery of the ABO's blood type; in other words, many  Japanese people have been catered according to blood types such as military, sport, work, politics, or even food products.

This picture shows when each blood types; A, B, O, and AB have an appointment at 3 o'clock, and their responses differ from each others depending on their blood group characters. This cartoon can infer that some Thai people are curious about personality of each blood type as Japanese believe. However,this issue in Thailand is less popular than Japan.

Personally, there is a wondering question that it is true that blood types relate with our personality. In the article above, Evens does not mention any study to support this relationship; however, he just mentions about some popular Japanese books.

However, according to "Blood type and personality", Rogers and Glendon conclude their study that there is significant irrelevance between blood type and personality.

Reference
Evans R.(2012, November 5).Japan and blood types; Does it determine personality? BBC NEWS Magazine. Retrieved November 9, 2012 from http://www.bbc.co.uk/news/magazine-20170787.
Rogers M. and Glendon A. Blood type and personality. Personality and Individual Differences 34 (2003), page 1099-1112.