Japan Blood Types

A is most common blood type in Japan with 40% of people having this type.
A is most common blood type in Japan with 40 of people having this type

It is raining in Tokyo and most of Japan today. I was planning to play golf, but decided to cancel due to the rain. I much prefer playing in sunshine ^^.

With the rain out, there is not much to do but maybe go find a seat in the blood bank. Right now, it looks like they have a shortage of all types of blood. The sign says 大ピンチ, dai pinchi or “in a large (pinch) bind”.

You can also see from this sign that in Japan the most common blood type is type A (40%), followed by O (30%). There are many books and magazines which say you can predict a persons personality from their blood type and also data showing a persons good fortune like using star signs, based on blood type.

Type A are said to be:

Conservative, introverted, reserved, patient, punctual, and perfectionist.”, but also “Obsessive, stubborn, self conscious, and uptight.

Type B are said to be:

Creative and passionate. Animal loving. Optimistic and flexible. Individualist, but also Forgetful, irresponsible, and self-centered.


Cool, controlled, rational. Sociable and popular. Empathic, but also Aloof, critical, indecisive and unforgiving.

O: commonly described as おおざっぱ, oozappa in Japanese meaning “about, rough, careless” said to be:

Ambitious, athletic, robust and self-confident. Natural leaders, but also Arrogant, vain and insensitive. Ruthless

For more detailed information on the blood types and so called character traits take a look at the source of these quotes from this Japanese blood type theory of personality article.

This article also gives a good write up on the different types and personalities.

What blood type is most common in your country? Do they have characters like this out in front of the blood banks in your part of the world?


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  • RT @Shibuya246: Japan Blood Types | Shibuya246 http://bt.io/BSYw No characters in front of our Blood Banks here. There is one company here in Texas called Carter Blood Care. And they have a bus that goes around to different companies for when they have blood drives. it’s brrn so long that I don’t even know my blood type, might have to check my marriage licenes to dee if it was put on there. After reading those descriptions, I could fit in with any type or a combination of all of them. the weather here in north tx the last few days and night have deen pretty chilly for us. Last night it got down to 21 degrees F and tonight it’s supposed to get down to 26 degrees F but then back up into the upper 60’s and a good chance of rain for the weekend. They have a texas saying, “If you don’t like the weather stick around and it will change in a “Snap”

  • No such things here.
    Don’t know my blood type. And knowing from where it starts it subtly takes into daily life bad ideas.
    Match making that way can’t be serious…

    This is one thing that japanese do not expect from foreigners. When I made a joke on that they looked at me with that “how do you know???” out-of-the-blue expression. ^^ that’s lots of fun!
    Not mentioning all the otaku culture.

  • I’m not so sure if other foreigners are as interested in blood types as Japanese are.
    Blood types are always a popular topic when a bunch of ppl go for a drink.

  • In New Zealand the most common blood type is O at 50% of the population. 38% are A. 11% are B. 4% are AB.
    I’m B -ve and my son is AB -ve which are the two rarest types.
    Unfortunately I am not allowed to give blood in New Zealand because I lived in England for more than 6 months between 1980 and 1990 and New Zealand doesn’t want to risk anyone getting ‘Mad Cow disease’ (Creutzfelt Jacob disease). This rule about people who have lived in the UK has caused a large number of people to be unable to give blood which means the blood bank is always desperate for new donors.