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{{about|their production logos used by Koei|the commercial tags|Koei (Commercial Tags)}}
{{PageCredits|description=Logophile, EnormousRat and RSX-798|capture=Logophile, EnormousRat, RSX-798 and GameFAQS.com|edits=RSX-798}}

===Background===
Koei Co, Ltd. was formed in July 1978 by husband and wife Yoichi Erikawa and Keiko Erikawa. The company is best known for the Dynasty Warriors series and its historical strategy games. The company formed its international subsidiaries in North America in 1988, in Canada in 2001 and in Europe in 2003. On April 1, 2009, Koei and [[Tecmo|Tecmo]] merged to form Tecmo Koei Holdings (now [[Koei Tecmo Games|Koei Tecmo Games]]), though both companies still use their own respective names for game development.
{{ImageTOC
|Koei logo (1991).png|1st Logo (June 25, 1990-December 21, 1991)
|KoeiNobunagasAmbition.png|2nd Logo (October 10, 1990-October 2, 1998)
|Koei (1992).jpeg|3rd Logo (March 19, 1992-November 1995)
|KOEI (1996).jpeg|4th Logo (September 16, 1994-December 3, 1998)
|Koei Presents (2014, Widescreen).png|5th Logo (December 17, 1998-December 17, 2015)
}}
===1st Logo (June 25, 1990-December 21, 1991) ===
{{Gallery
| align=center
| mode=packed
|KoeiIshinnoArashi.png|
|Koei logo (1991).png|
}}
{{YouTube|id=DLll4T462go|id2=wTVXVXtY7kg}}

'''Visuals:''' On a black background is "KOEI" in red and below that a thick red line with a black diamond inside it stretching to the centers of the top, bottom left and right respectively. After a second, "KOEI PRESENTS" in white italicized font appears below.

'''Variant:''' An early variant exists where "KOEI PRESENTS" is in a bolded computerized font.

'''Technique:''' A still, sprite-based graphic.

'''Audio:''' None.

'''Availability:''' Seen on Famicom/NES and Super Famicom/Super NES games of the time, such as ''Ishin no Arashi'', ''Romance of the Three Kingdoms II'' on both formats, ''Brandish II'', and ''Angelique''.

===2nd Logo (October 10, 1990-October 2, 1998)===
{{Gallery
| align=center
| mode=packed
|KoeiNobunagasAmbition.png|''Nobunaga's Ambition'' (1990)
|KoeiMonsterRace.png|''Monster ★ Race'' (1998)
}}
{{YouTube|id=PAmcTizZfWs}}

'''Visuals:''' On a white background is the Koei logo from before, this time in black, fading in. As the logo fades in, the word "{{font|Lucida Console|KOEI PRESENTS}}" appears below the logo.

'''Technique:''' A still, sprite-based graphic.

'''Audio:''' None.

'''Availability:''' Seen on their Game Boy games at the time, such as ''Nobunaga's Ambition'' and ''Monster ★ Race''.

===3rd Logo (March 19, 1992-November 1995)===
[[File:Koei (1992).jpeg|center|256px]]
{{YouTube|id=_J_fNj6O6UI|id2=qPSfK343XZU}}
'''Visuals:''' On a gray background is the Koei logo from the previous two, this time it is a gradient silver color. The logo shines and a blue shadow underneath flashes in and out. The background then turns black and below "KOEI PRESENTS" in white fades in below.

'''Variant:''' Sometimes, as the logo and "KOEI PRESENTS" fades out, the words "A KOU SHIBUSAWA PRODUCTION" appears.

'''Technique:''' Sprite-based 3D animation.

'''Audio:''' None.

'''Availability:''' Appears on Super NES and Genesis games such as ''Aerobiz'', ''Rise of the Phoenix'', ''Operation Europe: Path to Victory'', ''Liberty or Death'' and ''Romance of the Three Kingdoms III'' and ''IV''.

=== 4th Logo (September 16, 1994-December 3, 1998)===
<gallery mode="packed" heights="200">
File:Koei (1994).png
File:KOEI (1996).jpeg
File:Koei Presents (1997).png
</gallery>
{{youtube|id=https://youtu.be/qlK8_vDMhcQ|id2=https://youtu.be/iKlssaIpUjA}}
'''Visuals:''' A spot of light passes from the right side, showing plain blue "KOEI" with the figure below, rising from the horizontal position. As it rises, the logo changes color from blue to bright green and yellow-gray. A shine occurs behind, making the logo 3D and red. Then another light passes by and brings up "KOEI PRESENTS".

'''Variants:''' An earlier variant of the logo exists with a less bold logo and no "KOEI PRESENTS" wordmark.

'''Technique:''' CGI.

'''Audio:''' A drum beat segueing into a four-note synth entry, which sounds similar to a 90s ITV ident.

'''Availability:''' Appears on on a variety of PlayStation and Saturn games, including ''Romance of the Three Kingdoms IV'' and ''V'' (Genesis version has it still), ''Angelique'', and ''Destrega''.

===5th Logo (December 17, 1998-December 17, 2015)===
<gallery mode="packed" heights="200">
File:Koei Presents (2007, HQ).png
File:Koei Presents (w- registered mark).png
File:Koei Presents (2014, Widescreen).png
File:KoeiMonsterRace2.png
</gallery>
{{Youtube|id=IlCsV-CfW5Q|id2=FeSKcFuxf3A}}
'''Visuals:''' There is four letters of the name moving inside the spherical circle, which promptly turns into a figure with the name "KOei" inside. A red light dot flies around and poses as a dot above "i". Then "KOEI PRESENTS" appears below.

'''Variants:'''
*There is a later version with the figure already formed with some silver effect, and the dot, made as a red ball, jumping above to its place. A 60fps version exists.
*In latest games, the completely formed and still logo appears.
*Some games feature the animated variant with the registered mark; others don't have that.
*The logo was originally at 15fps with motion blur added to fit with 32-bit video compression standards.

'''Technique:''' CGI.

'''Audio:''' A crystallized chime. None in later games.

'''Availability:''' The animated variant is seen on a lot of games made before Koei Tecmo's merger, including ''Saiyuki - Journey West'', and games from the ''Romance of the Three Kingdoms'' (known in Japan as ''San Goku Shi''), ''Dynasty Warriors'' and ''Samurai Warriors'' series. The still logo appears on newer games by the company including ''Warriors Orochi 2'' and ''3''; the ''Ultimate Definitive Edition'' on PC doesn't feature the logo.

{{Chronology||[[Koei Tecmo Games]]|''Koei''<br>[[Tecmo]]}}
[[Category:Koei Tecmo Holdings]]
[[Category:Japanese video game logos]]
[[Category:Japan]]
[[Category:Video game logos]]