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
• After Burner II
• Aiken Masshigura!
• Alien Spot
• Asobo! Yuki Gassen
• Athletic Golf
• Atsuki Chishio Puzzle
• Aworg
• Baku Baku Animal
• Best Soccer
• Blades of Glory
• Blocks
• Bonanza Bros.
• Buster Met
• Channel 5 Nyuusha Shiken
• Channel 5 Nyuusha Shiken Nijiboshuu
• Columns Jr.
• Crazy Drive
• Cupid-chan
• Deep Scan
• Diver Met
• Doki Doki Penguin Land
• Dosu Koi! Sumou Michi
• Dou Butsu Yama Donketsu Gassen
• Dragon Book
• Dragon Crystal
• Edomae! Sushi Dou
• Fantasy Zone P1
• Fantasy Zone P2
• Fantasy Zone P3
• Fighting Tsumo
• Flicky
• Fukurou-kun no Happy Gomoku
• Futari de Puyo Puyo
• Gemini Drop
• Hanabi-Fight
• Hanagumi Columns
• Hanagumi Densha
• Hanagumi Frame
• Hanagumi Gionkan
• Hanagumi Hyakkaten
• Hanagumi Shashinkan
• Hansel to Warui Majo
• Head-On
• Hiraki Mahjong
• Hitori de Puyo Puyo
• Hyakunin Isshu
• Idaten! Mamachari Musume
• Idenshi Shindanri Ryoko-sensei
• K-Typing of the Dead
• Kakonde Buu!
• Keitai Adventure: Rakuen no Tobira
• Keitai de Nagai Tsuitachi
• Keitai de Nagai Tsuitachi 2
• Keitai Fighter Ran
• Keitai Jiken Bo 2: Youjou no Meikyuu
• Keitai Jiken Bo Challenge! Tantei Quiz
• Kenpa
• Kenpa Dai Undoukai Version
• Keudoro!
• Kirameki Jewelry
• Lady Commando
• Lucky Morolian
• Mobile Quartet
• Mobile Samurai
• Mobile SDI
• Monaco GP
• Moro Seijin no Hopping Puzzle
• Napoleon
• Nazo Puyo
• New York Hoshigumi Columns
• Ninja Princess
• O Ryouri! Mune Kyun
• Odoru Dai Kyuushutsu Sensen
• Omega Turn
• Omoshiroi Moro
• OutRun
• Oyoge! Mahiru-chan
• Paddle Fighter
• Paris no Yuugana Tsuitachi Keitai-ban
• Pata Pon
• Pengo
• Pine no Panel Puzzle
• Pipe Line
• Psychic Fantasy
• Psychic Fantasy 2
• Purge no Dengeki Oshioki Show
• Puyo Puyo
• Puyo Puyo Tsuu
• Puzzle da Moro!
• Pyramid Magic
• Pyramid Magic II
• Robocle
• Saigo no Kami
• Sakura Senryuu
• Sengoku San-ri Taisen Hanafuda
• Sonic Billiards
• Sonic Darts
• Sonic Gammon
• Sonic Panel Puzzle
• Sonic Reversi
• Sonic Tennis
• Space Met
• Speed DX
• Spevo
• Strawberry Sweet Pop
• Super Monaco GP
• Super Tennis
• Super Tennis Mini
• Super Tennis Xmas Version
• Taisen Mahjong HaoPai 2
• Tama-Oh
• Tant-R
• Tanuki-kun no Tsunawatari
• Tapioka Panic
• Teddy Boy Blues
• Tranquilizer Gun
• Treasure Seeker
• Tsuri Bass Nisshi
• Two Pair Giwaku
• Typing Jet
• Ulala no 15 Puzzle
• Ulala no Swingin' Slot
• Ultra Reversi
• Un Tei
• Virtua Yubizumou
• Waretsuku ga Horu Mon
• Waretsuku ga Horu Mon 2: Yoru no Jugyou Sankan Hen
• Waretsuku ga Nagetto: Dorobou Hen
• Woody Pop
• Yoidore Risshiden
• Yokoshima Baku Rei
• Yumaijiri

100KB

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

List of games

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

256KB

The J-SH53 upped the size to 256KB

List of games

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

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
• Real Baseball Katsu
• Shining Force Chronicle I
• Shining Force Chronicle II
• Shining Force Chronicle III
• Super Real Baseball
• Super Real Baseball 2

3G

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

List of games

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

Gallery

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  J-Sky logo

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  Vodafone Live! logo