Yahoo! Keitai

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Yahoo! Keitai, previously Vodafone Live! and J-Sky (Jスカイ) was a mobile internet service created by J-Phone before the company was purchased by Vodafone, then SoftBank. It offered a means to allow mobile phones to access the internet.

Sega began supporting the service in Japan in November 2000 with software releases by WOW Entertainment.

With the release of the J-SH07 in 22 June 2001, J2ME support was added, and a tie-in with United Game Artists and Space Channel 5 meant every phone was bundled with Tsuwa Shichouritsu.

Hardware

Unlike its main competitor, i-mode, the Yahoo! Keitai service did not have consistent naming schemes for its products, and much of the terminology would change as Vodafone, then SoftBank took over operations. Like many third-parties Sega chose to group handsets by the size of the J2ME applets (officially Java appli (Javaアプリ) then V-appli (Vアプリ) and finally S! appli (S!アプリ).

50KB

Starting with the J-SH07, J-Phones could run J2ME applets up to 50KB in size.

List of games

• 16t (2002)
• After Burner II (2003)
• Aiken Masshigura! (2003)
• Alien Spot (2002)
• Asobo! Yuki Gassen (2002)
• Athletic Golf (2003)
• Atsuki Chishio Puzzle (2003)
• Aworg (2002)
• Baku Baku Animal (No results?)
• Best Soccer (2002)
• Blades of Glory (2003)
• Blocks (2004)
• Bonanza Bros. (2002)
• Buster Met (2002)
• Channel 5 Nyuusha Shiken (2003)
• Channel 5 Nyuusha Shiken Nijiboshuu (2003)
• Columns Jr. (2001)
• Crazy Drive (2004)
• Cupid-chan (2003)
• Deep Scan (2003)
• Diver Met (2002)
• Doki Doki Penguin Land (2002)
• Dosu Koi! Sumou Michi (2004)
• Dou Butsu Yama Donketsu Gassen (2003)
• Dragon Book (?)
• Dragon Crystal (2004)
• Edomae! Sushi Dou (2003)
• Fantasy Zone P1 (2002)
• Fantasy Zone P2 (2002)
• Fantasy Zone P3 (2002)
• Fighting Tsumo (2003)
• Flicky (2001)
• Fukurou-kun no Happy Gomoku (2004)
• Futari de Puyo Puyo (2003)
• Gemini Drop (2004)
• Hanabi-Fight (2001)
• Hanagumi Columns (2004)
• Hanagumi Densha (?)
• Hanagumi Frame (?)
• Hanagumi Gionkan (2003)
• Hanagumi Hyakkaten (2003)
• Hanagumi Shashinkan (2003)
• Hansel to Warui Majo (2005)
• Head-On (2001)
• Hiraki Mahjong (2003)
• Hitori de Puyo Puyo (2002)
• Hyakunin Isshu (2004)
• Idaten! Mamachari Musume (2003)
• Idenshi Shindanri Ryoko-sensei (2002)
• Jyabakuryou (No results?)
• K Doro! (2003)
• K-Typing of the Dead (2001)
• Kakonde Buu! (2005)
• Keitai Adventure: Rakuen no Tobira (?)
• Keitai de Nagai Tsuitachi (2003)
• Keitai de Nagai Tsuitachi 2 (2004)
• Keitai Fighter Ran (2003)
• Keitai Jiken Bo 2: Youjou no Meikyuu (2004)
• Keitai Jiken Bo Challenge! Tantei Quiz (2003)
• Kenpa (2002)
• Kenpa Dai Undoukai Version (2002)
• Kirameki Jewelry (2002)
• Lady Commando (No results?)
• Lucky Morolian (2001)
• Mobile Quartet (No results?)
• Mobile Samurai (2003)
• Mobile SDI (2002)
• Monaco GP (2001)
• Moro Seijin no Hopping Puzzle (2004)
• Napoleon (2002)
• Nazo Puyo (2003)
• New York Hoshigumi Columns (2006)
• Ninja Princess (2003)
• O Ryouri! Mune Kyun (2003)
• Odoru Dai Kyuushutsu Sensen (2003)
• Omega Turn (2003)
• Omoshiroi Moro (2001)
• OutRun (2002)
• Oyoge! Mahiru-chan (2002)
• Paddle Fighter (2002)
• Paris no Yuugana Tsuitachi Keitai-ban (2005)
• Pata Pon (2001)
• Pengo (2001)
• Pine no Panel Puzzle (2003)
• Pipe Line (2004)
• Psychic Fantasy (2003)
• Psychic Fantasy 2 (2004)
• Purge no Dengeki Oshioki Show (2003)
• Puyo Puyo Tsuu (2003)
• Puzzle da Moro! (2001)
• Pyramid Magic (2004)
• Pyramid Magic II (2004)
• Robocle (2001)
• Saigo no Kami (2004)
• Sakura Senryuu (?)
• Sengoku San-ri Taisen Hanafuda (2006)
• Sonic Billiards (2004)
• Sonic Darts (2004)
• Sonic Gammon (2005)
• Sonic Panel Puzzle (2005)
• Sonic Reversi (2004)
• Sonic Tennis (2004)
• Space Met (2002)
• Speed DX (2004)
• Spevo (2001)
• Strawberry Sweet Pop (2002)
• Super Monaco GP (2003)
• Super Tennis (2002)
• Super Tennis Mini (2002)
• Super Tennis Xmas Version (2002)
• Taisen Mahjong HaoPai 2 (2002)
• Tama-Oh (2004)
• Tant-R (?)
• Tanuki-kun no Tsunawatari (2003)
• Tapioka Panic (2001)
• Teddy Boy Blues (2003)
• Tranquilizer Gun (2004)
• Treasure Seeker (2003)
• Tsuri Bass Nisshi (2003)
• Two Pair Giwaku (2003)
• Typing Jet (2001)
• Ulala no 15 Puzzle (2002)
• Ulala no Swingin' Slot (2004)
• Ultra Reversi (2002)
• Un Tei (2003)
• Virtua Yubizumou (2002)
• Waretsuku ga Horu Mon (2002)
• Waretsuku ga Horu Mon 2: Yoru no Jugyou Sankan Hen (2002)
• Waretsuku ga Nagetto: Dorobou Hen (2003)
• Woody Pop (2002)
• Yoidore Risshiden (2003)
• Yumaijiri (2002)

100KB

The J-SH51 in 2002 upped the size to 100KB.

List of games

• Deck Quest (2004)
• Dragon Book 2 (2005)
• Dragon Crystal II (2005)
• Fantasy Zone (2002)
• Foxy Shot (2005)
• Future Drive (2002)
• Hikou Chuudoku (2002)
• Puyo Puyo Fever (2004)
• Snobo Rider (2002)
• Space Channel 5 (2002)
• Space Channel 5 Ver. Haru (2003)
• Space Harrier (2002)
• Space Harrier Mini (2002)
• Tama-Oh 2 (2005)

256KB

The J-SH53 upped the size to 256KB

List of games

• 1000 Mile Monogatari (2004)
• 3D Hiraki Pai (2004)
• 3D Mahjong Geki Pai (?)
• Amigo-kun no Doki Doki Aishou Check (2005)
• Amy no Page One (2006)
• Blades of Glory 2 (2005)
• Blocks The Next Level (2007)
• Bouzu Mekuri. (2005)
• Columns S (?)
• Crossword no Mori 2: Ubawa Reta Mori (2006)
• Crossword no Mori 3: Kotonoha no Yukue (2007)
• Crossword no Mori: Sarawa Reta Megami (2006)
• Deck Quest (2004)
• Dou Butsu Yama Sports Test (2004)
• Flicky Kanzenban (2005)
• Galaxy Force II (2004)
• Gateball de Asobou! (2007)
• Jukugon (2005)
• Jukugon 2 (2006)
• Jukugon Sanran Ki (2006)
• Kanji Trainer Mobile (2007)
• Monkey Ball (2003)
• Phantasy Star (2005)
• Power Drift (2004)
• Puyo Puyo Fever (2004)
• Puyo Puyo Fever DX (2006)
• Puyo Puyo Fever Xmas Ver. (2005)
• Puyo Puyo Tsuu (2003)
• Puyo Puyo Zurashi (2006)
• Real Baseball (?)
• Real Billiards (2004)
• Real Tennis (2004)
• Segagaga R-720 (2005)
• Sengoku San-ri Taisen Hanafuda (2006)
• Shadow Shoot (2007)
• Shining Road: To the Force (2005)
• Sonic Golf 3D (2006)
• Sonic Hopping (No results?)
• Sonic Hopping 2 (2007)
• Sonic Jump (2006)
• Sonic no 7 Narabe (2007)
• Sonic no Daifuugou (2005)
• Sonic no Jigen Ressha (2007)
• Sonic Reversi Hyper (2006)
• Space Harrier DX (2005)
• Sugorouku (2007)
• Super Real Tennis (2003)
• Taisen Mahjong HaoPai 2 Kanzenban (2005)
• Toku Toku Toranpu (2005)
• Wonder Boy (2004)
• Wonder Boy Monster Land (2005)
• Zunzunkyou no Yabou (2006)

256KB Ver. 2

In 2004, rather than increase the maximum size of applets, a decision was made to improve other areas of the standard, allowing for real-time 3D graphics.

List of games

• The House of the Dead Mobile (2005)
• Real Baseball Katsu (?)
• Shining Force Chronicle I (2006)
• Shining Force Chronicle II (2006)
• Shining Force Chronicle III (2006)
• Super Real Baseball (2004)
• Super Real Baseball 2 (?)

3G

When Vodafone started selling 3G-enabled phones, the standard changed again.

List of games

• Avatar o Tsukurou! (2007)
• Blades of Monsters (2011)
• Boku to Tora-san. (2009)
• BT Taisen Mahjong HaoPai 2 Kanzenban (2006)
• Burning Rescue (?)
• Columns Jewel (2008)
• Daifugou Pretty (?)
• Doki Doki Penguin Land (2007)
• Edomae! Sushi Michi (2011)
• Gain Ground Again (2010)
• Ikenai Koi Mail (2010)
• Jalala no Mori (?)
• Kaitou Reinya in Columns (?)
• Katachidasu (?)
• Koizora for Girls: Kun to Kanaderu Mirai (2009)
• Koizora: Kimi ga Hohoemu Machi (2008)
• Madou Monogatari I (2009)
• Madou Monogatari II (2009)
• Madou Monogatari III (2009)
• Nanpure Trainer (2011)
• Nazo Puyo 2 (2006)
• OutRun (2007)
• Power Smash Mobile (2009)
• Puyo Puyo 7 Gakkou Mode (?)
• Puyo Puyo Fever Habanero (2007)
• Puyo Puyo Solitaire (2008)
• Puyo Puyo Sun (2006)
• Puyo Puyo Tsuu DX (?)
• Puyo Puyo Tsuu DX Ketteiban (2011)
• Puyo Puyo! (2010)
• Puyo Puyo~n & Columns (2007)
• Sangokushi Shisenshou (No results?)
• Sega Rally Championship (2005)
• Shining Force EXA Mobile (2008)
• Shining Road 2: Kuroki Ryuu no Miko (2006)
• Shinobi (2011)
• Shougi no Oushou: Oute Machi Shiten (No results?)
• Shuukan Crossword no Mori (2010)
• Shuukan Logic (2012)
• Skeleton Trainer (2012)
• Sonic Reversi Hyper (2009)
• Sonic Tennis DX (2010)
• Sukima no Mushi (2011)
• Super Monkey Ball Uki Uki Seesaw (2008)
• Taisen Puyo Puyo (2006)
• Taisen Puyo Puyo Tsuu DX (2008)
• Touch de Uno! DX: Hansha Shinkei Hen (2010)
• Yume Mitsutsu (2011)

Promotional material

Summer Book (2001)

Summer Book (2001)

Artwork

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  J-Sky logo

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  Vodafone Live! logo