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Ketsueki-gata Meaning: How to Say “Blood Type” in Japanese

Japanese

コダック
Today’s Japanese word is 血液型（けつえきがた・ketsueki-gata）.

It simply means “blood type” or “blood group.” The word itself is medical and neutral; the personality meaning comes from the surrounding culture.

Contents

Ketsueki-gata meaning: the quick answer

血液型 at a glance

  • Kanji: 血液型
  • Hiragana: けつえきがた
  • Katakana: ケツエキガタ
  • Romaji: ketsueki-gata / ketsuekigata
  • Meaning: blood type; blood group
  • Part of speech: noun

The hyphen in ketsueki-gata is optional romanization. It helps learners see that the word is made from 血液 plus 型.

Kanji breakdown: 血 + 液 + 型

The core image

血（けつ／ち） — blood

液（えき） — liquid, fluid

型（かた／がた） — type, model, form or pattern

血液 literally means “blood fluid,” the standard word for blood in medical or formal contexts. Add 型, and you get “blood type.”

Japanese has the everyday word 血（ち・chi） for blood. Why use the longer word 血液?
コダック
Great question. 血 is the ordinary word you use for visible blood—“My finger is bleeding.” 血液 sounds more clinical and refers to blood as a bodily fluid or medical substance. A classification system therefore uses 血液型, not 血型.

Ketsueki-gata pronunciation

Read けつえきがた as six clear mora:

け・つ・え・き・が・た
ke – tsu – e – ki – ga – ta

Do not compress the middle into an English-style “ketsweek.” Keep the sequence tsu-e-ki audible.

Why is 型 “gata” instead of “kata”?

By itself, 型 is commonly read かた（kata）. In this compound, the initial k becomes g:

血液（ketsueki） + 型（kata） → 血液型（ketsueki-gata）

This type of consonant voicing in compounds is called 連濁（れんだく・rendaku）.

Kanji, hiragana and katakana: which form is natural?

  • 血液型 — normal and standard
  • けつえきがた — useful for children, pronunciation guides or learners
  • ケツエキガタ — possible for stylistic emphasis, but not the ordinary spelling

For a normal sentence, write 血液型.

How to say the four blood types in Japanese

A, B, O and AB in Japanese

Japanese Reading English
A型 エーがた (ē-gata) type A
B型 ビーがた (bī-gata) type B
O型 オーがた (ō-gata) type O
AB型 エービーがた (ē-bī-gata) type AB

Japanese pronounces the Roman letters by their Japanese letter names: エー, ビー and オー.

How to ask someone’s blood type

Polite

血液型は何型ですか？
Ketsueki-gata wa nani-gata desu ka?
“What is your blood type?”

Casual

血液型、何型？
Ketsueki-gata, nani-gata?
“What blood type are you?”

Ask whether someone knows

自分の血液型、知ってる？
Jibun no ketsueki-gata, shitteru?
“Do you know your blood type?”

How to answer

私はO型です。
Watashi wa O-gata desu.
“I’m type O.”

私の血液型はAB型です。
Watashi no ketsueki-gata wa AB-gata desu.
“My blood type is AB.”

血液型は分かりません。
Ketsueki-gata wa wakarimasen.
“I don’t know my blood type.”

In context, the shortest answer is completely natural:

A型です。
A-gata desu.
“Type A.”

Useful compounds with 血液型

Words you will see online

  • ABO式血液型（ABOしきけつえきがた）— the ABO blood group system
  • 血液型検査（けつえきがたけんさ）— blood typing test
  • 血液型占い（けつえきがたうらない）— blood-type fortune-telling
  • 血液型性格診断（けつえきがたせいかくしんだん）— blood-type personality test
  • 血液型の相性（けつえきがたのあいしょう）— blood-type compatibility
  • 血液型不適合（けつえきがたふてきごう）— blood-group incompatibility

Does ketsueki-gata imply personality?

Not by itself. 血液型 literally names the blood group. Context determines whether the speaker means medicine, personal information or the popular personality theory.

Medical:
輸血の前に血液型を確認します。
“We confirm the blood type before a transfusion.”

Casual culture:
血液型で性格が分かると思う？
“Do you think blood type can tell you someone’s personality?”

For the culture behind the second example, read Japanese Blood Type Personality.

10 example sentences with 血液型

  1. あなたの血液型は何型ですか？
    What is your blood type?
  2. 私はB型です。
    I’m type B.
  3. 自分の血液型を知りません。
    I don’t know my blood type.
  4. 子どものころに血液型を調べました。
    I had my blood type checked when I was a child.
  5. 血液型は性格と関係があると思いますか？
    Do you think blood type is related to personality?
  6. 血液型占いは日本でよく知られています。
    Blood-type fortune-telling is well known in Japan.
  7. 血液型だけで人を判断しないでください。
    Please do not judge people only by blood type.
  8. このプロフィールには誕生日と血液型が書いてあります。
    This profile lists the birthday and blood type.
  9. 輸血では血液型の適合性が重要です。
    Blood-group compatibility is important in transfusion.
  10. A型とO型は相性がいいと言われることがあります。
    People sometimes say type A and type O are compatible.

Common learner mistakes

Wrong: ketsueki kata

In this compound, use gata: ketsueki-gata.

Wrong: 私は血液型Aです

Natural forms are 私はA型です or 私の血液型はA型です.

Wrong: treating O as zero

O型 uses the letter O, pronounced オー, not the number zero.

So the word is straightforward. The complicated part is not the Japanese—it is the cultural baggage around it.
コダック
Exactly. Linguistically, 血液型 = blood type. The personality chart, compatibility and harassment questions are separate layers that Japanese culture sometimes attaches to the noun.

FAQ about ketsueki-gata

What does ketsueki-gata mean?

血液型 (ketsueki-gata) means blood type or blood group.

How do you write ketsueki-gata in Japanese?

The standard form is 血液型. In hiragana it is けつえきがた, and in katakana it is ケツエキガタ.

Why is kata pronounced gata in ketsueki-gata?

The initial k sound of 型 (kata) becomes g inside the compound. This common Japanese sound change is called rendaku.

How do you say “I am type A” in Japanese?

Say 私はA型です (Watashi wa A-gata desu) or 私の血液型はA型です (Watashi no ketsueki-gata wa A-gata desu).

Does ketsueki-gata also mean blood type personality?

Literally it only means blood type. Cultural context may connect it with personality, fortune-telling or compatibility, but those ideas require additional words such as 性格, 占い or 相性.

Blood Word and Question Check

Two small choices decide whether your sentence sounds natural.

Q1. Are you talking about visible blood, or blood as a type or bodily fluid?
An injury, a cut, something you can see → 血 (chi)
the everyday word for blood
Blood type, transfusion, medical context → 血液 (ketsueki)
the clinical, formal term
Q2. Are you asking someone their blood type politely or casually?
A stranger or formal situation → 血液型は何型ですか？
the full polite question
A friend, casual conversation → 血液型、何型？
dropped particles, informal tone

※ In context, an even shorter reply like A型です is completely natural once the topic is already blood type.

Ketsueki-gata meaning: summary

Key points

  • 血液型（けつえきがた） means blood type or blood group.
  • It consists of 血液 (blood) + 型 (type).
  • 型 changes from kata to gata through rendaku.
  • The standard written form is 血液型.
  • A型, B型, O型 and AB型 mean types A, B, O and AB.
  • The word itself is neutral; personality and compatibility meanings come from context.
References and further reading

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