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星と暦の占い

Blood-type stories

A, B, O and AB: stories of four types

Personal qualities, love and marriage, work and rest: four character portraits familiar in Japan offer gentle words to consider alongside your present tasks and those of someone you care about.

From four stories, a reading for you

Personal qualities, love and marriage, work, money and rest: images familiar in Japan offer a perspective on everyday choices.

A link between blood type and personality or compatibility has not been scientifically established. Enjoy the situations that feel familiar to you.

Even if you do not know your blood type, choose a story that interests you. This reading does not determine an actual blood type.

Your two blood types, explored through three situations

Love, friendship and work: explore topics you can use in your relationship in each context. Your selected context is placed near the beginning of the reading.

This article offers a way to discuss how you actually want to spend time, without defining the other person by a type. It does not compare the two of you through scores or rankings.

You: type A / Other person: type O · Romance and partnership

Sharing the unseen work, too

You can exchange roles according to your actual wishes.

01

A starting point for your shared story

This combines a story of arranging details with one of connecting the whole. The reading considers direction alongside the tasks needed to follow it. After choosing a destination for the next plan, each select one preparation task.

Blood types need not fix who supports and who entrusts. Roles can change on days for detailed checks and days for contacting everyone. In the next discussion, hear about their preparation, then offer one piece of help you can give.

Open the guide to this chapter

The unordered pair A-O is referenced. Swapping sides does not change a success rate or assign roles; which approach either person actually chooses is not fixed.

02

As romantic or domestic partners

A remembered preference or words on a difficult day may become a happy memory. Express care through naming a helpful scene as well as gifts. At your next meeting, create time when the usual organizer need not choose.

Daily preparation includes time for planning purchases and communicating. Compare the effort before starting alongside visible tasks. Next weekend's arrangements can keep whoever notices from automatically handling everything.

Open the guide to this chapter

Two cultural character stories are independently adapted into invitations, promises and sharing everyday responsibilities.

03

As friends or family

When both want to help companions, both may become busy supporting everyone. At the next gathering, reduce one organizational task and choose time to sit as participants yourselves.

Even in a relationship where you can seek advice, meetings need not always solve something. Add a food you want to enjoy together to your next message alongside difficulties, opening a meeting simply for pleasure.

Open the guide to this chapter

Examples of conversations that distinguish shared enjoyment from each person's circumstances.

04

As colleagues working together

You imagine a scene with one person putting the overall goal into words and another lining up the checks that are needed. Roles can be chosen by what people actually want. At the next kickoff, you can put the finish line and who's checking what on the same list.

If eagerness to proceed differs from a wish to check, look for a scope that can advance first rather than only stopping or continuing. In the next submission, report checked parts separately from those awaiting a reply.

Open the guide to this chapter

An original situational reading separating proposals, checks, roles and deadlines. Ability and occupational suitability are not classified by blood type.

05

Choosing costs and responsibilities together

If upfront payments and arrangements gather with the same person, check amounts separately from effort. For the next shared purchase, take turns ordering and collecting contributions.

Open the guide to this chapter

Examples of discussing payments and preparation. They do not estimate financial compatibility or future gains.

06

A starting point for talking when opinions differ

When tempted to compare how much each has done, return to one next request. Appreciation and a difficulty with the current division can both be expressed. In the next discussion, separate what helped from what you want changed.

Open the guide to this chapter

Original concrete examples return to the step where a difficulty arose, instead of attributing its cause to blood type.

07

One thing you can try together next

Write out both people's preparation and exchange one step that was usually unseen. For the next plan, alongside thanking them, send one message they usually handle yourself.

Open the guide to this chapter

A suggestion for dialogue drawn from the two selected stories, rather than a calculation using dates or medical blood compatibility.

Sources and the scope of this article

Scientific evidence that blood type determines personality or compatibility has not been established. This article independently adapts four character portraits familiar in Japan to everyday situations. It does not calculate your character or future from research-paper results.

Blood type is not used to calculate favorable or unfavorable years, months or days, marriage timing or a probability of relationship success. A passage that does not fit can become a starting point for discussing your actual tastes and wishes.

  • Kengo Nawata (2014): No Relationship Between Blood Type and Personality

    The methods and findings of social surveys in Japan and the United States were checked. The text is an original narrative; statistics on attitudes toward life are not used to calculate an individual's personality or suitable occupation.

  • Tsuchimine et al. (2015), PLOS ONE

    A preliminary study reported a small difference in the TCI Persistence scale. It is not treated as evidence for conventional blood-type character descriptions, combinations with zodiac signs or compatibility between two people.

  • BPO: Request Issued on December 8, 2004

    The request concerning categorical judgments and value judgments in broadcasts was reviewed. Beyond a disclaimer, it informs the decision to exclude rankings, success rates and fixed roles based on blood type from the text itself.

  • Hyogo Red Cross Blood Center: About Blood Types

    Approximate Japanese proportions of A 40%, B 20%, O 30% and AB 10% were checked. They are not presented as a current population survey for a specific year or connected to character descriptions.

  • National Diet Library: Bibliographic Record for Masahiko Nomi's 1971 Book

    The title, author and publication year were checked. This does not indicate that the full book was read or that its interpretations or compatibility text were reproduced.

The four blood types

Zodiac sign × blood type: 48 combinations

This original article brings two character portraits together. Explore nine chapters for your selected combination.

The history of blood-type personality ideas

  1. 1927

    Takeji Furukawa's paper on temperament by blood type appeared in The Japanese Journal of Psychology, Volume 2, Issue 4. It is introduced here as a historical bibliographic record; its character classifications are not applied to present-day readers.Sources

  2. 1971

    Masahiko Nomi's book on compatibility through blood type was published. Its author, title and year were checked in the National Diet Library record. This does not indicate that its full text was read or its compatibility descriptions reproduced.Sources

  3. December 8, 2004

    BPO's Broadcast and Youth Committee published a request concerning programs on blood types. It raised concerns about presentation suggesting scientific grounds, value judgments based on type and effects on children.Sources

  4. 2014

    Kengo Nawata reanalyzed three social surveys in Japan and the United States. He reported no significant differences in 65 of 68 attitude-to-life items, with small effects for the remaining differences. The paper also states that these were not standardized personality tests.Sources

  5. 2015

    Tsuchimine and colleagues examined TCI measures and genotypes in 1,427 Japanese participants. They reported a small difference in Persistence and described the findings as preliminary, requiring cautious interpretation. This research is separate from testing popular compatibility claims or the 48 types.Sources

What does the research tell us?

  • Kengo Nawata (2014), The Japanese Journal of Psychology, Volume 85, Issue 2A secondary analysis of Japanese and US social surveys concluded that differences in attitudes toward life by blood type were practically small. It used self-reported blood types and general life attitudes, rather than providing individual personality assessments.
  • Cramer & Imaike (2002), Publisher's AbstractA study using the NEO-PI with over 400 Canadian university students reported neither a main effect of blood type nor an interaction with gender. The publisher's abstract was reviewed for this entry.
  • Rogers & Glendon (2003), Publisher's AbstractThe study recruited 360 blood donors; the final analysis included 240 people, with 30 men and 30 women in each blood type. It examined the Big Five personality factors and optimism and reported no support for an association. Recruitment and analysis counts are stated separately.
  • Tsuchimine et al. (2015), PLOS ONEIn TCI data from 1,427 Japanese participants, partial η² for Persistence was 0.010 by genotype and 0.006 across four phenotypes. This was reported as a small preliminary association, not evidence establishing conventional blood-type character descriptions.

Enjoying blood-type readings thoughtfully

The character portraits and relationship readings on this page are original 星と暦 writing based on cultural images. They do not use research totals to determine your thinking or another person's feelings.

An idea that feels familiar and one that does not fit you now can both open a conversation about your actual wishes. When reading with someone, leave a turn to ask how that person wants to spend their time, rather than focusing only on the type description.

Sources and the scope of this article

Scientific evidence that blood type determines personality or compatibility has not been established. This article independently adapts four character portraits familiar in Japan to everyday situations. It does not calculate your character or future from research-paper results.

Blood type is not used to calculate favorable or unfavorable years, months or days, marriage timing or a probability of relationship success. A passage that does not fit can become a starting point for discussing your actual tastes and wishes.

  • Kengo Nawata (2014): No Relationship Between Blood Type and Personality

    The methods and findings of social surveys in Japan and the United States were checked. The text is an original narrative; statistics on attitudes toward life are not used to calculate an individual's personality or suitable occupation.

  • Tsuchimine et al. (2015), PLOS ONE

    A preliminary study reported a small difference in the TCI Persistence scale. It is not treated as evidence for conventional blood-type character descriptions, combinations with zodiac signs or compatibility between two people.

  • BPO: Request Issued on December 8, 2004

    The request concerning categorical judgments and value judgments in broadcasts was reviewed. Beyond a disclaimer, it informs the decision to exclude rankings, success rates and fixed roles based on blood type from the text itself.

  • Hyogo Red Cross Blood Center: About Blood Types

    Approximate Japanese proportions of A 40%, B 20%, O 30% and AB 10% were checked. They are not presented as a current population survey for a specific year or connected to character descriptions.

  • National Diet Library: Bibliographic Record for Masahiko Nomi's 1971 Book

    The title, author and publication year were checked. This does not indicate that the full book was read or that its interpretations or compatibility text were reproduced.

Frequently asked questions

Can blood type really tell you someone's personality?

A relationship between blood type and personality has not been scientifically established. A reanalysis of three social surveys in Japan and the United States by Kengo Nawata in 2014 concluded that differences in attitudes toward life were practically small. 星と暦's texts are cultural articles, distinct from using research to diagnose an individual.

What is the history behind blood-type readings?

Historical references include Takeji Furukawa's 1927 paper and the bibliography of Masahiko Nomi's 1971 book Compatibility Through Blood Types. In 2004, BPO published a request concerning the subject's treatment in television programs. This page's history and source sections explain the scope and references in detail.

What if I do not know my blood type?

You can begin with a character story that interests you without finding out your blood type. Recognizing yourself in a passage does not reveal your actual blood type. Choose one idea from the four stories that you want to use in a present task.

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