Just for fun, I decided to round up the all upcoming Japanese developed games with actual dates for the consoles...
Wii
05.20.10 Japan Winning Eleven Playmaker 2010: Aoki Samurai no Chousen (Konami)
05.27.10 Super Mario Galaxy 2 (Nintendo)
06.10.10 Karaoke Joysound Wii: Duet Kyokuhen (Hudson)
06.10.10 Karaoke Joysound Wii: Enka Kayoukyouku Hen (Hudson)
06.10.10 Xenoblade (Nintendo)
06.17.10 HOSPITAL. 6-nin no Ishi (Atlus)
06.17.10 Kaseki Monster: Spectrobes (Disney Interactive Studios)
06.24.10 SD Gundam: Gashapon Wars (Bandai)
06.24.10 Twinkle Queen (Milestone)
07.22.10 Kage no Tou (Hudson)
07.29.10 Sengoku Basara 3 (Capcom)
PlayStation 3
05.20.10 Lost Planet 2 (Capcom)
05.20.10 World Soccer Winning Eleven 2010: Aoki Samurai no Chousen (Konami)
06.17.10 Clash of the Titans (Namco)
06.17.10 Hakuouki: Junsouroku Idea Factory)
06.24.10 Totori no Atelier: Arland no Renkinjutsushi 2 (Gust)
06.24.10 White Album: Tsuzurareru Fuyu no Omoide (Aqua Plus)
07.01.10 BlazBlue: Continuum Shift (Arc System Works)
07.15.10 Ken to Mahou to Gakuen Mono. 2G (Acquire)
07.29.10 Chou Jigen Game: Neptune (Idea Factory)
07.29.10 Sengoku Basara 3 (Capcom)
Xbox 360
05.20.10 Lost Planet 2 (Capcom)
05.20.10 Senko no Ronde Duo (G.Rev)
05.27.10 DeathSmiles IIX (Cave)
06.03.10 W.L.O. Sekai Renai Kikousen (5pb.games)
06.17.10 Clash of the Titans (Namco)
06.24.10 Monster Hunter Frontier Online (Capcom)
06.24.10 Sengoku Hime 2 (SystemSoft)
07.01.10 Japan BlazBlue: Continuum Shift (Arc System Works)
07.29.10 Agarest Senki Zero (Idea Factory)
07.29.10 Memories Off: Yubikiri no Kioku (5pb.games)
07.29.10 Strike Witches: Shirogane no Tsubasa (Cyberfront)
...actually, it's kinda sad all around. Consoles are dying in Japan. :/
Meanwhile, here's handhelds in the same period with the same considerations (JP made, firm date)...
Nintendo DS
05.13.10 Trick DS-han: Kakushi Kami no Sumukan (Konami)
05.20.10 Captain Tsubasa: Gekitou no Kiseki (Konami)
05.20.10 Minna de Dokusho DS Naruhodo! Tanoshii Seikatsu no Urawaza Inwaza (Dorart)
05.27.10 Dakkoshite! Chimpanzee (Starfish SD)
05.27.10 G.G Series Collection Plus (Genterprise)
05.27.10 Kunio-Kun no Chou Nekketsu! Soccer League Plus World Hyper Cup Hen (Arc System Works)
05.27.10 Medarot DS: Kabuto Version (Rocket Company)
05.27.10 Medarot DS: Kuwagata Version (Rocket Company)
05.27.10 Mommy Talk DS (Intelligent Design)
05.27.10 Sekai no Hate Made Itte Q! Chinjuu Hunter Mono no Daibouken (Kamui)
05.27.10 Soccer Tsuku DS: World Challenge 2010 (Sega)
05.27.10 Super Robot Taisen OG Saga: Masou Kishin: The Lord of Elemental (Bandai)
05.27.10 Yumeiro Patisserie: My Sweets Cooking (Konami)
06.03.10 Hisshou Pachinko: Pachi-Slot Kouryaku Series DS Vol. 5: Shinseiki Evangelion: Tamashii no Kiseki (D3 Publisher)
06.03.10 Kaidan Restaurant: Ura Menu 100-Sen (Bandai)
06.10.10 Ippan Zaidan Houjin: Nippon Kanji Shuujukudo Kentei Kikou Kounen: Tsuutenkaku DS (NowPro)
06.10.10 Maru Goukaku Shikaku Dasshu! Gyouseishoshi Shiken (Media5)
06.10.10 RockMan Zero Collection (Capcom)
06.17.10 Ao-Don DS: Hanabi no Goku & Hanabi no Takumi (Commseed)
06.17.10 Kochira Katsushikaku Kameari Kouenmae Hashutsujo: Machiteba Tengoku! Makereba Jigoku! Ryoutsuryuu Ikkakusenkin Dais
akusen! (Bandai)
06.17.10 Roller Angels: Pasha to Daisakusen (Starfish SD)
06.17.10 Tamagotchi no Pichi Pichi Omisecchi (Bandai)
06.24.10 Ghost Trick (Capcom)
06.24.10 Love Plus
+ (Konami)
06.24.10 Maru Goukaku Shikaku Dasshu! Financial Planning Ginou Kentei Shiken 2-Kyuu 3-Kyuu (Media5)
06.24.10 Tokimeki Memorial Girl's Side 3rd Story (Konami)
07.01.10 Digimon Story: Lost Evolution (Bandai)
07.01.10 Inazuma Eleven 3: Sekai e no Chousen!! Bomber (Level-5)
07.01.10 Inazuma Eleven 3: Sekai e no Chousen!! Spark (Level-5)
07.01.10 Taiko no Tatsujin DS: Dororon! Youkai Daikessen!! (Namco)
07.08.10 Bokujou Monogatari: Futago no Mura (Marvelous)
07.15.10 Japan Keshisasu-Kun: Battle Kas-tival (Koei)
07.15.10 Metal Fight Beyblade: Bakugami Susanoh Shuurai! (Hudson)
07.22.10 Fairy Tale (Konami)
07.29.10 Nintama Rantarou: Gakunen Taikousen Puzzle! no Dan (Russel)
07.29.10 Suki Desu Suzuki-kun!! 4-nin no Suzuki-kun (Idea Factory)
07.29.10 Wizardry: Boukyaku no Isan (Genterprise)
08.07.10 Monster Rancher 2 (Tecmo)
PSP
05.13.10 Hakuouki: Yuugi Roku (Idea Factory)
05.13.10 Pachinka Mania P: CR Tekken Tafu (Dorart)
05.20.10 B's-Log Party (Idea Factory)
05.20.10 Ginsei Igo Portable (SilverStar)
05.20.10 Hagane no Renkinjutsushi: Fullmetal Alchemist: Yakusoku no Hi e (Bandai)
05.20.10 Motto Nuga-Cel! (Idea Factory)
05.20.10 Otometeki Koi Kakumei: Love Revo! Portable (Idea Factory)
05.20.10 World Soccer Winning Eleven 2010: Aoki Samurai no Chousen (Konami)
05.27.10 Blaze Union: Story to Reach the Future (Atlus)
05.27.10 Daisenryaku Perfect: Senjou no Hasha
05.27.10 Fight Ippatsu! Juden-Chan!! CC (Russel)
05.27.10 Secret Game Portable (Yeti)
05.27.10 So-Ra-No-Wo-To: Otome no Gojuusou (Idea Factory)
06.03.10 Clannad: Mitsumi Mamoru Sakamichi de: Joukan (Prototype)
06.03.10 Fairy Tail: Portable Guild (Konami)
06.03.10 Hisshou Pachinko: Pachi-Slot Kouryaku Series Portable Vol. 1: Shinseiki Evangelion: Tamashii no Kiseki (D3 Publisher)
06.10.10 Wand of Fortune Portable (Idea Factory)
06.24.10 Boku no Natsuyasumi Portable 2: Nazo Nazo Shimai to Chinbotsusen no Himitsu (Sony Computer Entertainment)
06.24.10 Chaos;Head Noah (5pb.games)
06.24.10 Clannad: Mitsumi Mamoru Sakamichi de: Gekan (Prototype)
06.24.10 D.C. Girl's Symphony Pocket (Idea Factory)
06.24.10 Hana to Otome ni Shukufuku o: Harekaze no Okurimono (Alchemist)
06.24.10 Narcissus: Moshimo Ashita ga Runara (Kadowkawa Games)
06.24.10 R.U.R.U.R.: Petit Prince (Views)
06.24.10 Shin Koihime Musou: Otome Ryouran: Sangokushi Engi: Wu-Hen (Yeti)
06.24.10 Starry Sky: In Spring - PSP Edition (Asgard)
06.24.10 The King of Fighters Portable 94-98: Chapter of Orochi (SNK Playmore)
06.24.10 Tinkle: Crusaders GoGo! (ASCII Media Works)
06.24.10 Uta no: Prince-Sama (Broccoli)
07.01.10 Hanayaka Kana, Ware ga Ichizoku (Idea Factory)
07.08.10 The Conveni Portable (Hamster)
07.15.10 Busou Shinki: Battle Masters (Konami)
07.15.10 Hello Kitty to Issho! Block Crash 123!! (Dorart)
07.15.10 Last Ranker (Capcom)
07.15.10 Naruto Shippuden: Kizuna Drive (Bandai)
07.22.10 Ace Combat X2: Joint Assault (Namco)
07.22.10 Fate/Extra (Marvelous)
07.22.10 Nisenochigiri (Idea Factory)
07.29.10 GA: Geijutsuka Art Design Class: Slapstick Wonder Land (Russel)
07.29.10 Hatsune Miku: Project Diva 2nd (Sega)
07.29.10 Koisuru Otome to Shugo no Tate Portable (Alchemist)
07.29.10 Ys vs. Sora no Kiseki: Alternative Saga (Falcom)
08.05.10 Corpse Party: Blood Covered: Repeated Fear (5bp.games)
09.30.10 Starry Sky: In Summer: PSP Edition (Asgard)
12.22.10 Starry Sky: In Autumn: PSP Edition (Asgard)
03.24.11 Starry Sky: In Winter: PSP Edition (Asgard)
