# Mobile21

> Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Mobile21
> Markdown URL: https://mediated.wiki/source/Mobile21.md
> Source: https://en.wikipedia.org/wiki/Mobile21
> Source revision: 1356936260
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

{{Short description|Japanese video game developer}}
{{Use mdy dates|date=March 2025}}
{{Infobox company
| name = Mobile21 Co., Ltd.
| logo = 
| native_name = モバイル２１株式会社
| romanized_name = Mobairu21 kabushiki gaisha
| type = [Joint venture](/source/Joint_venture)
| industry = [Video game](/source/Video_game_industry)
| founded = October 7, 1999
| defunct = December 14, 2002{{cn|date=April 2025}}
| fate = Defunct
| location = [Asakusabashi](/source/Asakusabashi), [Tokyo](/source/Tokyo), Japan<ref name="Company Profile" />
| key_people = Masaki Yoneoka (president)<ref name="Nintendo Online Magazine April 2000" />
| owners = {{Unbulleted list|[Nintendo](/source/Nintendo) (50%)|[Konami](/source/Konami) (50%)}}
| website =
}}

{{Nihongo foot|'''Mobile21 Co., Ltd.'''|モバイル２１株式会社|Mobairu21 [kabushiki gaisha](/source/kabushiki_gaisha)|lead=yes|group=lower-alpha}} was a Japanese video game developer that was a 50/50 joint venture between [Nintendo](/source/Nintendo) and [Konami](/source/Konami) established in October 1999. Mobile21 primarily concentrated on creating [Game Boy Advance](/source/Game_Boy_Advance) games, with a particular focus utilizing the [mobile phone](/source/mobile_phone) linking features of the [Mobile Adapter GB](/source/Mobile_Adapter_GB) accessory. The company was led by Masaki Yoneoka and its headquarters were located within Nintendo's offices in the [Asakusabashi](/source/Asakusabashi) district of [Tokyo](/source/Tokyo).

== History ==
On September 2, 1999, Nintendo and Konami announced the establishment of Mobile21, a joint venture focused on developing software for Nintendo consoles with network connectivity. As part of this initiative, Nintendo planned to release an adapter the following year to connect the [Game Boy Color](/source/Game_Boy_Color) and [Game Boy Advance](/source/Game_Boy_Advance) to cell phones, enabling online interactions. The company also had plans to develop software for the future [GameCube](/source/GameCube) console.<ref name="press releases">{{multiref2|1={{Cite press release |title=Alliance and Joint Venture Company Establishment between Nintendo and Konami |date=September 2, 1999 |publisher=Nintendo Co., Ltd.; Konami Co., Ltd. |url=http://www.konami.co.jp/press/1999/r.11.09.02e.html |access-date=March 5, 2025 |archive-url=https://web.archive.org/web/20070310185759/http://www.konami.co.jp/press/1999/r.11.09.02e.html |archive-date=March 10, 2007}}
|2={{Cite press release |title=任天堂とコナミの提携および合弁会社設立について |date=September 2, 1999 |url=https://www.nintendo.co.jp/n10/news/990902a.html |archive-url=https://web.archive.org/web/20070322005527/http://www.nintendo.co.jp/n10/news/990902a.html |archive-date=March 22, 2007 |trans-title=Nintendo and Konami Announce Partnership and Joint Venture Establishment |lang=ja}} }}</ref><ref>{{Cite web |last=Tam |first=Augie |date=October 2000 |title=Fun 'n Games in the New Economy |url=https://www.japaninc.com/article.php?articleID=461 |access-date=March 6, 2025 |website=Japan Inc |language=en}}</ref> Each company invested {{Yen|150 million|link=yes}} in the joint venture.<ref name="CNN-1999">{{cite web |last1=Drexler |first1=Michael |title=Nintendo, Konami venture aimed at mobile gaming |url=http://www.cnn.com/TECH/computing/9909/07/mobile.games.idg/index.html |website=[CNN](/source/CNN) |access-date=26 April 2026 |archive-url=https://web.archive.org/web/20000915101643/http://www.cnn.com/TECH/computing/9909/07/mobile.games.idg/index.html |archive-date=15 September 2000 |date=7 September 1999 |url-status=dead}}</ref>

Operations began on October 7, 1999, with an initial capital of {{Yen|200 million|link=no}}, evenly split between Nintendo and Konami.<ref name="Company Profile">{{Cite web |title=会社概要のペ |trans-title=Company Profile |url=http://www.mobile21.co.jp/company.html |url-status=dead |archive-url=https://web.archive.org/web/20021005055743fw_/http://www.mobile21.co.jp/company.html |archive-date=October 5, 2002 |access-date=March 6, 2025 |website=Mobile21 |language=ja}}</ref> However, each company retained only 15% of the stock, leaving 70% available to grant to employees in anticipation of an early [public offering](/source/public_offering), part of an aggressive talent recruitment strategy.<ref name="press releases" /><ref name="Nintendo Online Magazine April 2000">{{Cite magazine |date=April 2000 |title=モバイル２１株式会社 |trans-title=Mobile 21 Co., Ltd. |url=https://www.nintendo.co.jp/nom/0004/03/page02.html |url-status=dead |archive-url=https://web.archive.org/web/20070304144054/https://www.nintendo.co.jp/nom/0004/03/page02.html |archive-date=March 4, 2007 |access-date=March 5, 2025 |magazine=Nintendo Online Magazine |language=ja |issue=20}}</ref>

The [Mobile Adapter GB](/source/Mobile_Adapter_GB) and the Mobile System GB service were unveiled at the [Nintendo Space World](/source/Nintendo_Space_World) event in August 2000.<ref name="Gamers Republic">{{Cite magazine |date=October 2000 |title=Spaceworld 2000: The Dawn of GameCube |url=https://archive.org/details/Gamers_Republic_Issue_29/page/n7 |magazine=Gamers Republic |pages=6–8 |issue=29}}</ref> At the time, Nintendo planned to release them in December,<ref name="Press Release">{{Cite press release |title=ゲームボーイによる携帯電話ネットワーク 「 モバイルシステムGB 」について |date=August 24, 2000 |url=http://www.nintendo.co.jp/n10/news/000824/c.html |language=ja |access-date=March 3, 2025 |url-status=dead |archive-url=https://web.archive.org/web/20001018092103/http://www.nintendo.co.jp/n10/news/000824/c.html |archive-date=October 18, 2000 |trans-title=About the Game Boy mobile phone network "Mobile System GB" |website=Nintendo}}</ref> however, delays establishing the service pushed the launch back to January 27, 2001, for a [MSRP](/source/MSRP) of {{Yen|5,800}}.<ref name="MobileDelay">{{Cite news |last=Harris |first=Craig |date=October 31, 2000 |title=No Mobile Adapter Until 2001 |url=https://www.ign.com/articles/2000/10/31/no-mobile-adapter-until-2001 |access-date=March 3, 2025 |work=IGN}}</ref><ref>{{Cite web |date=January 27, 2001 |title=Game Boy Mobile Adapter Delayed |url=https://archive.rpgamer.com/news/Q4-2000/110100c.html |url-status=live |archive-url=https://web.archive.org/web/20110106033030/http://www.rpgamer.com/news/Q4-2000/110100c.html |archive-date=January 6, 2011 |access-date=September 13, 2010 |website=RPGamer}}</ref>

The Mobile Adapter GB was not a commercial success, selling 80,000 units in its first year on the market,<ref name="Sales">{{Cite news |last=Harris |first=Craig |date=March 30, 2001 |title=Low Numbers for Mobile Adapter GB |url=https://www.ign.com/articles/2001/03/30/low-numbers-for-mobile-adapter-gb |access-date=March 3, 2025 |work=IGN |language=en}}</ref> leading the Mobile System GB service to be discontinued after less than two years on December 14, 2002.<ref>{{Cite news |last=Sledge |first=Ben |date=August 13, 2022 |title=Pokemon Crystal Had Long Distance Trading Years Before The Nintendo DS |url=https://www.thegamer.com/pokemon-crystal-mobile-adapter-gb/ |access-date=February 5, 2023 |work=TheGamer}}</ref> The end of the Mobile Adapter GB also led to the end of Mobile21.

== Games ==
Mobile21 produced twelve games during its time in existence, six of which used the Mobile Adapter GB.<ref>{{Cite web |title=タイトル |trans-title=Titles |url=http://www.mobile21.co.jp/lineup.html |url-status=dead |archive-url=https://web.archive.org/web/20021011044355fw_/http://www.mobile21.co.jp/lineup.html |archive-date=October 11, 2002 |access-date=March 6, 2025 |website=Mobile21}}</ref>
{| class="wikitable sortable sticky-header"
! Name !! Release date !! Publisher !! Platform !! Notes
|-
| ''[Monster Guardians](/source/Monster_Guardians)'' || {{dts|2001|03|21}} || [Konami](/source/Konami) || [GBA](/source/Game_Boy_Advance) || Mobile Adapter GB support
|-
| ''[Tanbi Musou: Meine Liebe](/source/Meine_Liebe)'' || {{dts|2001|04|26}} || [Konami](/source/Konami) || [GBA](/source/Game_Boy_Advance) ||
|-
| ''[Doraemon: Midori no Wakusei Doki Doki Daikyūshutsu!](/source/List_of_Doraemon_media)'' || {{dts|2001|04|27}} || [Epoch](/source/Epoch_Co.) || [GBA](/source/Game_Boy_Advance) || Mobile Adapter GB support
|-
| ''[Net de Get Minigames @100](/source/Net_de_Get_Minigames_%40100)'' || {{dts|2001|07|12}} || [Konami](/source/Konami) || [GBC](/source/Game_Boy_Color) || Mobile Adapter GB support
|-
| ''[EX Monopoly](/source/Monopoly_(video_game))'' || {{dts|2001|07|13}} || [Takara](/source/Takara) || [GBA](/source/Game_Boy_Advance) || Mobile Adapter GB support
|-
| ''[Mobile Pro Yakyū: Kantoku no Saihai](/source/Mobile_Pro_Yaky%C5%AB%3A_Kantoku_no_Saihai)'' || {{dts|2001|07|26}} || [Konami](/source/Konami) || [GBA](/source/Game_Boy_Advance) || Mobile Adapter GB support
|-
| ''[Jurassic Park III: Island Attack](/source/Jurassic_Park_III%3A_Island_Attack)'' || {{dts|2001|08|30}} || [Konami](/source/Konami) || [GBA](/source/Game_Boy_Advance) ||
|-
| ''[Okuman Chouja Game: Nottori Daisakusen!](/source/Okuman_Chouja_Game%3A_Nottori_Daisakusen!)'' || {{dts|2001|11|30}} || [Takara](/source/Takara) || [GBA](/source/Game_Boy_Advance) ||
|-
| ''[Gradius Galaxies](/source/Gradius_Galaxies)'' || {{dts|2002|01|17}} || [Konami](/source/Konami) || [GBA](/source/Game_Boy_Advance) ||
|-
| ''[Mail de Cute](/source/Mail_de_Cute)'' || {{dts|2002|02|14}} || [Konami](/source/Konami) || [GBA](/source/Game_Boy_Advance) || Mobile Adapter GB support
|-
| ''[Koro Koro Puzzle Happy Panechu!](/source/Koro_Koro_Puzzle_Happy_Panechu!)'' || {{dts|2002|03|08}} || [Nintendo](/source/Nintendo) || [GBA](/source/Game_Boy_Advance) ||
|-
| ''[AirForce Delta Storm](/source/AirForce_Delta_Storm)'' || {{dts|2002|09|16}} || [Konami](/source/Konami) || [GBA](/source/Game_Boy_Advance) ||
|}

== Notes ==
{{Notelist}}

== References ==
{{Reflist}}

== External links ==
*[https://web.archive.org/web/20020927174654/http://www.mobile21.co.jp/ Official website] (Archived, in Japanese)
*[https://web.archive.org/web/20060518141812/http://www.geocities.jp/rikkyjp/ope/mobile.html Mobile21 history page] {{in lang|ja}} 

{{Nintendo developers}}
{{Authority control}}

Category:Video game companies established in 1999
Category:Defunct video game companies of Japan
Category:Video game development companies
Category:1999 establishments in Japan
Category:Defunct Nintendo divisions and subsidiaries
Category:Konami

---
Adapted from the Wikipedia article [Mobile21](https://en.wikipedia.org/wiki/Mobile21) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Mobile21?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.