虚数単位

Imaginary unit - square root of negative one, used to define complex numbers. Article “虚数単位” in Japanese Wikipedia has 16.6 points for quality (as of July 1, 2026). The article contains 7 references and 10 sections.

This article has the best quality in English Wikipedia. Also, this article is the most popular in that (Japanese) language version.

Since the creation of article “虚数単位”, its content was written by 57 registered users of Japanese Wikipedia and edited by 1294 registered Wikipedia users in all languages.

The article is cited 191 times in Japanese Wikipedia and cited 2725 times in all languages.

The highest Authors Interest rank from 2001:

• Local (Japanese): #338 in August 2003
• Global: #5787 in May 2004

The highest popularity rank from 2008:

• Local (Japanese): #16716 in April 2021
• Global: #13022 in April 2018

There are 46 language versions for this article in the WikiRank database (of the considered 55 Wikipedia language editions).

The quality and popularity assessment was based on Wikipédia dumps from July 1, 2026 (including revision history and pageviews for previous years).

The table below shows the language versions of the article with the highest quality.

#	Language	Quality grade	Quality score
1	English (en) Imaginary unit		48.3102
2	Greek (el) Φανταστική μονάδα		46.8699
3	Tamil (ta) கற்பனை அலகு		41.1617
4	Chinese (zh) 虛數單位		39.4073
5	Polish (pl) Jednostka urojona		34.066
6	Catalan (ca) Unitat imaginària		32.8905
7	Turkish (tr) İ sayısı		29.3995
8	Portuguese (pt) Unidade imaginária		28.9138
9	Spanish (es) Unidad imaginaria		26.6764
10	French (fr) Unité imaginaire		25.8971

More...

The following table shows the most popular language versions of the article.

The most popular language versions of the article "虚数単位" in all the time

#	Language	Popularity award	Relative popularity
1	English (en) Imaginary unit		4 229 863
2	Russian (ru) Мнимая единица		1 073 329
3	Japanese (ja) 虚数単位		594 200
4	Italian (it) Unità immaginaria		455 316
5	Polish (pl) Jednostka urojona		296 442
6	Portuguese (pt) Unidade imaginária		211 446
7	Chinese (zh) 虛數單位		210 707
8	Spanish (es) Unidad imaginaria		208 633
9	French (fr) Unité imaginaire		201 115
10	Turkish (tr) İ sayısı		181 688

More...

The following table shows the language versions of the article with the highest popularity in the last month.

The most popular language versions of the article "虚数単位" in June 2026

#	Language	Popularity award	Relative popularity
1	English (en) Imaginary unit		9 305
2	Russian (ru) Мнимая единица		2 095
3	Japanese (ja) 虚数単位		1 318
4	French (fr) Unité imaginaire		759
5	Chinese (zh) 虛數單位		738
6	Italian (it) Unità immaginaria		630
7	Spanish (es) Unidad imaginaria		385
8	Polish (pl) Jednostka urojona		381
9	Portuguese (pt) Unidade imaginária		231
10	Turkish (tr) İ sayısı		201

More...

The following table shows the language versions of the article with the highest Authors’ Interest.

Language versions of the article "虚数単位" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.

#	Language	AI award	Relative AI
1	English (en) Imaginary unit		389
2	Italian (it) Unità immaginaria		78
3	French (fr) Unité imaginaire		66
4	Japanese (ja) 虚数単位		57
5	Polish (pl) Jednostka urojona		55
6	Russian (ru) Мнимая единица		54
7	Chinese (zh) 虛數單位		43
8	Dutch (nl) Imaginaire eenheid		40
9	Turkish (tr) İ sayısı		35
10	Danish (da) Imaginære enhed		32

More...

The following table shows the language versions of the article with the highest Authors’ Interest in the last month.

Language versions of the article "虚数単位" with the highest AI in June 2026

#	Language	AI award	Relative AI
1	Romanian (ro) Unitatea imaginară		3
2	Italian (it) Unità immaginaria		2
3	Tamil (ta) கற்பனை அலகு		1
4	Arabic (ar) وحدة تخيلية		0
5	Azerbaijani (az) İ ədədi		0
6	Belarusian (be) Уяўная адзінка		0
7	Bulgarian (bg) Имагинерна единица		0
8	Catalan (ca) Unitat imaginària		0
9	Czech (cs) Imaginární jednotka		0
10	Danish (da) Imaginære enhed		0

More...

The following table shows the language versions of the article with the highest number of citations.

Language versions of the article "虚数単位" with the highest Citation Index (CI)

#	Language	CI award	Relative CI
1	English (en) Imaginary unit		327
2	French (fr) Unité imaginaire		201
3	Russian (ru) Мнимая единица		192
4	Japanese (ja) 虚数単位		191
5	Chinese (zh) 虛數單位		166
6	Italian (it) Unità immaginaria		136
7	Catalan (ca) Unitat imaginària		119
8	Polish (pl) Jednostka urojona		106
9	Ukrainian (uk) Уявна одиниця		95
10	Portuguese (pt) Unidade imaginária		86

More...

#	Language	Value
ar	Arabic وحدة تخيلية
az	Azerbaijani İ ədədi
be	Belarusian Уяўная адзінка
bg	Bulgarian Имагинерна единица
ca	Catalan Unitat imaginària
cs	Czech Imaginární jednotka
da	Danish Imaginære enhed
el	Greek Φανταστική μονάδα
en	English Imaginary unit
eo	Esperanto Imaginara unuo
es	Spanish Unidad imaginaria
et	Estonian Imaginaarühik
eu	Basque Unitate irudikari
fa	Persian یکه موهومی
fi	Finnish Imaginaariyksikkö
fr	French Unité imaginaire
gl	Galician Unidade imaxinaria
he	Hebrew I (מספר)
hi	Hindi अधिकल्पित एकक
hr	Croatian Imaginarna jedinica
hu	Hungarian Imaginárius egység
hy	Armenian Երևակայական միավոր
id	Indonesian Unit imajiner
it	Italian Unità immaginaria
ja	Japanese 虚数単位
ko	Korean 허수 단위
lt	Lithuanian Menamasis vienetas
ms	Malay Unit khayalan
nl	Dutch Imaginaire eenheid
no	Norwegian Imaginær enhet
pl	Polish Jednostka urojona
pt	Portuguese Unidade imaginária
ro	Romanian Unitatea imaginară
ru	Russian Мнимая единица
sh	Serbo-Croatian Imaginarna jedinica
simple	Simple English Imaginary unit
sl	Slovenian Imaginarna enota
sr	Serbian Имагинарна јединица
sv	Swedish Imaginära enheten
ta	Tamil கற்பனை அலகு
th	Thai หน่วยจินตภาพ
tr	Turkish İ sayısı
uk	Ukrainian Уявна одиниця
ur	Urdu تخیلی اکائی
vi	Vietnamese Đơn vị ảo
zh	Chinese 虛數單位

Best Rank

Japanese: #16716 04.2021

Global: #13022 04.2018

Best Rank

Japanese: #338 08.2003

Global: #5787 05.2004

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The WikiRank project is intended for automatic relative evaluation of the articles in the various language versions of Wikipedia. At the moment the service allows to compare over 50 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2026. When calculating current popularity and AI of articles data from June 2026 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2026... More information