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Evidence-led referenceJapanese names, readings and kanji
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ReferenceNamesSeijirō
Canonical reference record
JMnedict-backedKANJIDIC2 character context
Japanese given name

Seijirō

制二朗

Male-classified given-name records.

せいじろうセイジロウSeijirō
Compare spellings
Reference coverage

Extended source depth

This reading group has a comparatively broad dictionary footprint across source-recorded spellings or records. The counts describe corpus coverage, not real-world popularity.

Distinct recorded spellings64

group-level written forms

Source spelling/reading rows64

records contributing to this reading group

Coverage levelExtended

based only on the imported source footprint

Pronunciation & romanization

How to read Seijirō

The kana reading is source-recorded. Romanization and mora segmentation are deterministic reading aids generated from that kana; pitch accent is not inferred.

Source readingせいじろう

Normalized to hiragana for comparison.

Katakana formセイジロウ

The same reading converted to katakana.

RomanizationSeijirō

Macron-style display. Vowel-sequence form: Seijirou. Personal spelling and true vowel boundaries can differ.

Mora segmentationせ · い · じ · ろ · う

5 morae in this reading. Small ゃ/ゅ/ょ-type kana join the preceding mora.

Audio note: the play button uses Japanese text-to-speech provided by the visitor’s browser/device. It is a convenience preview, not a recorded native-speaker pronunciation or pitch-accent authority.

Reading profile

How Seijirō is represented

These counts describe records in the imported name corpus. They are not a ranking of how popular a spelling is among people in Japan.

Recorded kana readings1

せいじろう

Kanji-based spellings64

among the forms analyzed on this page

Kana characters5

in the primary dictionary reading

Morae5

small ゃ/ゅ/ょ-type kana combine with the preceding mora

2-kanji forms16

recorded spellings

3-kanji forms48

recorded spellings

JMnedict classification evidence

How this reading is classified in the source corpus

This separates dictionary classification from popularity. The same exact kana reading can be recorded as a given name, a surname, or both, and given-name records can carry male, female or unspecified source labels.

Primary reading recorded asGiven name

せいじろう in the imported JMnedict corpus

Given-name written forms87

87 source spelling/reading rows

Surname written forms0

0 source spelling/reading rows

Given-name labelsmale 87

row counts carrying each JMnedict source label

Exact readingGiven-name evidenceGiven-name labelsSurname evidence
せいじろうSeijirō8787 source rowsmale 87source rows · distinct forms: male 8700 source rows

Classification boundary: male/female/unspecified are labels attached to imported JMnedict name records. They are not population shares, probabilities, identity claims, or evidence that a spelling is currently common in Japan. A source row can also be repeated across different written forms, so row counts and distinct-writing counts are shown separately.

Spelling anatomy

Corpus structure behind Seijirō

This section summarizes the exact source-recorded forms loaded for this reading group. Stroke and character-position statistics are descriptive corpus properties, not popularity or style scores.

Kanji forms with complete stroke data64

16–35 strokes observed span

Median total strokes24

among forms with complete KANJIDIC2 stroke data

All-kanji name-classified forms64

all component kanji loaded as jōyō/jinmeiyō classes

Other/unclassified kanji forms0

contains at least one character outside that loaded classification

Source-reading distribution
ReadingRomanizationMoraeForms
せいじろうSeijirō564
Recurring adjacent kanji sequences
二郎19 analyzed forms二朗16 analyzed forms次郎7 analyzed forms治郎5 analyzed forms制二2 analyzed forms勢二2 analyzed forms

Shown only when the same adjacent two-kanji sequence occurs in at least two analyzed source forms. Open a sequence in Kanji Pair Research for corpus co-occurrence context.

Reading ambiguity

Can the same writing be read another way?

11 of 64 displayed written forms have more than one given-name reading somewhere in the active JMnedict corpus. This is dictionary-record ambiguity, not a prediction of how a particular person reads the name.

Written forms checked64

distinct spellings displayed on this page

Multiple recorded readings11

exact written forms with 2+ source readings

Single recorded reading53

within this active given-name corpus

Largest reading set4

distinct kana readings for one displayed writing

清次郎
2 source-recorded readings
KiyojirōきよじろうSeijirōせいじろう · this page

A reading shown without a link is still source-recorded, but its destination group does not currently meet the canonical publication standard. Strong reference pages do not promote limited records merely to create extra internal links.

Kanji role reference

How recurring characters function across Seijirō spellings

Position counts are calculated only from the distinct written forms analyzed for this page. KANJIDIC2 nanori are character-level name-reading references; they are not used here to decompose or assert the reading of a specific multi-kanji name.

KanjiCharacter glossesFormsFirstFinalInternalSoloStrokesKANJIDIC2 nanoriLoaded class
二two, two radical (no. 7)35003502おと, つぐ, つぎ, にい +5Jōyō · KANJIDIC grade 1
郎son, counter for sons32032009いら, お, とう, もん +2Jōyō · KANJIDIC grade 8
朗clear, bright, distinct160160011—Jinmeiyō · KANJIDIC grade 10
赦pardon, forgiveness160160011—Jōyō · KANJIDIC grade 8
次next, order, sequence700706き, すき, つぐ, よしJōyō · KANJIDIC grade 3
誠sincerity, admonish, warn6600013きよ, さと, しげ, とも +4Jōyō · KANJIDIC grade 6
治reign, be at peace, calm down500508し, ぢ, はり, はる +1Jōyō · KANJIDIC grade 4
正correct, justice, righteous550005おお, くに, ま, まさし +1Jōyō · KANJIDIC grade 1
清pure, purify, cleanse5500011あき, さや, し, すが +3Jōyō · KANJIDIC grade 4
征subjugate, attack the rebellious, collect taxes440008いく, そ, ただ, まさ +1Jōyō · KANJIDIC grade 8
精refined, ghost, fairy4400014きよJōyō · KANJIDIC grade 5
静quiet4400014しづJōyō · KANJIDIC grade 4

Counts describe this source-recorded spelling set, not population use. A repeated kanji can contribute to more than one position role across different spellings.

Exact writing research map

Move from a spelling to its readings, characters and literal sequence context

These relationships are exact and source-backed. Whole-name readings shown in each card come from JMnedict within the current name class; exact-writing search can surface records from other name classes. Character links open KANJIDIC2-backed kanji pages. Sequence context means the same kanji string occurs contiguously in another recorded written form—it does not prove shared origin or meaning.

Showing research maps for the first 10 distinct written forms out of 64. Every detailed spelling card below still links to exact-writing search and its component kanji.

For VPS safety, contiguous-sequence lookups are limited to six 2–4 kanji forms per canonical page and cached for 12 hours per active JMnedict generation.

Corpus pattern

Kanji recurring across Seijirō spellings

Only characters appearing in at least two distinct analyzed spellings are shown here. Frequency describes this source-recorded spelling set, not real-world baby-name popularity.

二two, two radical (no. 7)35 of 64 analyzed forms郎son, counter for sons32 of 64 analyzed forms朗clear, bright, distinct16 of 64 analyzed forms赦pardon, forgiveness16 of 64 analyzed forms次next, order, sequence7 of 64 analyzed forms誠sincerity, admonish, warn6 of 64 analyzed forms治reign, be at peace, calm down5 of 64 analyzed forms正correct, justice, righteous5 of 64 analyzed forms清pure, purify, cleanse5 of 64 analyzed forms征subjugate, attack the rebellious, collect taxes4 of 64 analyzed forms
Same reading, different writing

Explore written forms of Seijirō

64 source-recorded forms use the primary source reading せいじろう. Other source readings can appear in this romanized group when the imported records converge on the same index form. Use Compare to inspect exact spellings side by side.

Spelling comparator

Compare Seijirō forms side by side

Each exact written spelling appears once in this table even when JMnedict records more than one reading for that writing. Stroke totals and character glosses come from KANJIDIC2 when all component kanji are available.

SpellingOne source readingCharacter-level glossesTotal strokesLoaded character class
制二朗せいじろう制 — system, law · 二 — two, two radical (no. 7) · 朗 — clear, bright21All kanji jōyō/jinmeiyō-classified
制二郎せいじろう制 — system, law · 二 — two, two radical (no. 7) · 郎 — son, counter for sons19All kanji jōyō/jinmeiyō-classified
制赦せいじろう制 — system, law · 赦 — pardon, forgiveness19All kanji jōyō/jinmeiyō-classified
勢二朗せいじろう勢 — forces, energy · 二 — two, two radical (no. 7) · 朗 — clear, bright26All kanji jōyō/jinmeiyō-classified
勢二郎せいじろう勢 — forces, energy · 二 — two, two radical (no. 7) · 郎 — son, counter for sons24All kanji jōyō/jinmeiyō-classified
勢赦せいじろう勢 — forces, energy · 赦 — pardon, forgiveness24All kanji jōyō/jinmeiyō-classified
征二朗せいじろう征 — subjugate, attack the rebellious · 二 — two, two radical (no. 7) · 朗 — clear, bright21All kanji jōyō/jinmeiyō-classified
征二郎せいじろう征 — subjugate, attack the rebellious · 二 — two, two radical (no. 7) · 郎 — son, counter for sons19All kanji jōyō/jinmeiyō-classified
征治郎せいじろう征 — subjugate, attack the rebellious · 治 — reign, be at peace · 郎 — son, counter for sons25All kanji jōyō/jinmeiyō-classified
征赦せいじろう征 — subjugate, attack the rebellious · 赦 — pardon, forgiveness19All kanji jōyō/jinmeiyō-classified
成二朗せいじろう成 — turn into, become · 二 — two, two radical (no. 7) · 朗 — clear, bright19All kanji jōyō/jinmeiyō-classified
成二郎せいじろう成 — turn into, become · 二 — two, two radical (no. 7) · 郎 — son, counter for sons17All kanji jōyō/jinmeiyō-classified
成赦せいじろう成 — turn into, become · 赦 — pardon, forgiveness17All kanji jōyō/jinmeiyō-classified
政次郎せいじろう政 — politics, government · 次 — next, order · 郎 — son, counter for sons24All kanji jōyō/jinmeiyō-classified
政治郎せいじろう政 — politics, government · 治 — reign, be at peace · 郎 — son, counter for sons26All kanji jōyō/jinmeiyō-classified
整二郎せいじろう整 — organize, arranging · 二 — two, two radical (no. 7) · 郎 — son, counter for sons27All kanji jōyō/jinmeiyō-classified

The comparison table shows the first 16 distinct written forms; the detailed cards above show up to 80 spelling/reading records.

What does Seijirō mean?

There is not necessarily one fixed English meaning. The reading identifies the spoken name; different written forms can use different kanji. Character glosses describe individual kanji and should not be treated as proof of the intention behind a particular person’s name.

Related readings

More names beginning with せい

Related by the opening kana of the dictionary reading. This is a deterministic browsing relationship, not a claim that the names share the same meaning.

Given name · male · limited reference

Seiji

142 recorded spellings

Explore →Given name · male · limited reference

Seīchirō

104 recorded spellings

Explore →Given name · male · limited reference

Seigorō

98 recorded spellings

Explore →Given name · male · limited reference

Seinosuke

86 recorded spellings

Explore →Given name · female · limited reference

Seika

80 recorded spellings

Explore →Given name · female · limited reference

Seiko

79 recorded spellings

Explore →Given name · mixed records · limited reference

Seira

79 recorded spellings

Explore →Given name · mixed records · limited reference

Seiki

69 recorded spellings

Explore →Given name · male · limited reference

Seitarō

66 recorded spellings

Explore →Given name · female · limited reference

Seikō

64 recorded spellings

Explore →Given name · female · limited reference

Seishi

56 recorded spellings

Explore →Given name · female · limited reference

Seina

52 recorded spellings

Explore →
Continue research

Where to go next from Seijirō

Use literal reading, character and corpus relationships to continue without treating nearby records as automatically related.

Exact reading

Search せいじろう

See source records matching this kana reading or beginning with it.

Continue →Reading family

Se / せ

Browse other public given names with the same opening reading family.

Continue →Character reference

二 — two, two radical (no. 7)

Open the kanji page for readings, classifications and literal name-use context.

Continue →Character reference

郎 — son, counter for sons

Open the kanji page for readings, classifications and literal name-use context.

Continue →Interactive discovery

Open Name Explorer

Use the same name type and 5-mora reading length as a starting point.

Continue →
Evidence on this page

What each source establishes

JMnedict establishes recorded written forms, readings and name classifications; where safely associated, this page can also show JMnedict-supplied trans_det source text without treating it as a whole-name meaning. KANJIDIC2 supplies character readings, nanori, stroke counts, grade classes and English character glosses. The Ministry of Justice remains the official reference for Japanese child-name character rules. The Agency for Cultural Affairs romanization guidance is the reference for generated Latin-script reading aids.

JMnedictChecked 17 Sep 2026Active data built 16 Sep 2026Stored status: downloaded
KANJIDIC2Checked 17 Sep 2026Active data built 17 Sep 2026
Japan Ministry of Justice — characters usable in children’s namesChecked 17 Sep 2026
Japan Agency for Cultural Affairs — Romanization Rules (2025)Checked 17 Sep 2026
Source boundary

The spelling-frequency and structural counts on this page are calculated from imported JMnedict records. They are corpus counts, not population-frequency claims. KANJIDIC2 supplies the kanji metadata used in character and stroke comparisons.

Review sources →