Since we've talked so much about third party announcements before and after launch, actual releases and such, I've decided to create two posts where we set the records clear on different points of discussion
1) Announcements made by Japanese publishers / developers since the console's unveiling up to the launch
2) Releases by Japanese publishers / developers from the launch to the console's first Holiday (in case of an Holiday release, the subsequent one)
Major rules behind the comparison
- I'm sticking to actual game announcements. So, these lists won't feature all those mentioned series in the initial 3DS list from E3 2010 for example, as well as the series mentioned for Switch back at the January event (personally, I think they'll turn out to be more "real" announcements than what happened with 3DS, given the different announcement policy, but I watn a comparison that's as just as possible, so I won't put them for Switch

).
- digital-only announcements / releases aren't included, retail releases only
1) Announcements made by Japanese publishers / developers since the console's unveiling up to the launch
Nintendo 3DS
E3 2010 (June 15th, 2010)
Super Monkey Ball 3D (SEGA)
Codename: Chocobo Racing 3D (then cancelled) (Square-Enix)
Kingdom Hearts 3D (Square-Enix)
Dead or Alive: Dimensions (Koei Tecmo)
Samurai Warriors Chronicles (Koei Tecmo)
Naruto Shippuden 3D: The New Era (Takara Tomy)
Cubic Ninja (AQ Interactive)
Devil Survivor: Overclocked (Atlus)
Resident Evil: Revelations (Capcom)
Super Street Fighter IV: 3D Edition (Capcom)
Deca Sports Extreme (Hudson)
Metal Gear Solid 3D: Snake Eater (Konami)
Professor Layton and the Mask of Miracle (Level 5)
Ridge Racer 3D (Bandai Namco)
Nintendo Fall Conference - September 29th, 2010
Bust-a-Move Universe (Square-Enix)
Ace Combat: Assault Horizon Legacy (Bandai Namco)
Tales of the Abyss (Bandai Namco)
Resident Evil: The Mercenaries 3D (Capcom)
Megaman Legends 3 (then cancelled) (Capcom)
Class of Heroes 3Dx3D (Acquire)
Animal Resort (Marvelous)
Announcements outside of these events
DualPenSports (Bandai Namco)
One Piece: Unlimited Cruise SP (Bandai Namco)
Pro Baseball Famista 2011 (Bandai Namco)
Pro Jiykouu Spirits 2011 (Konami)
Professor Layton v.s. Ace Attorney (Level 5)
Fantasy Life (Level 5)
Time Travellers (Level 5)
Girls RPG: Cinderella's Life (Level 5)
Fish Eyes 3D (Marvelous)
Doctor Lautrec and the Forgotten (Konami)
Unchained Blades (FuRyu)
BlazBlue: Continuum Shift II (ArcSystem Works)
PlayStation Vita
E3 2011 (June 6th, 2011)
Dynasty Warriors Next (Koei Tecmo)
Street Fighter x Tekken (Capcom)
Pre-TGS Conference (September 15th, 2011)
Army: Corps of Hell (Square Enix)
Lord of Apocalypse (Square Enix)
Final Fantasy X /X-2 HD Remaster (Square Enix)
MGS HD Collection (Konami)
BlazBlue: Continuum Shift: Extend (Arc System Works)
Disgaea 3: Absence of Detention (NIS)
Mahjong Fight Club: Shinsei Zenkoku Taisen Ban
Ridge Racer (Namco Bandai)
Shinobido 2: Tales of the Ninja (Spike Chunsoft)
Touch My Katamari (Bandai Namco)
Ultimate Marvel vs. Capcom 3 (Capcom)
Tales of Innocence R (Bandai Namco)
Announcements outside of these events
New Little King's Story (Konami)
Virtue's Last Reward (Spike Chunsoft)
Shin Kamaitachi no Yoru: Jyuichi-nin-me no Suspect (Spike Chunsoft)
Super Monkey Ball: Banana Splitz (SEGA)
Persona 4: The Golden (Atlus)
Ys Celceta: Sea of Trees (Falcom)
Ninja Gaiden: Sigma (Koei Tecmo)
Dream Club Zero Portable (D3 Publisher)
Let's Fish! Hooked On! (Kadokawa Games)
Ragnarok Odyssey (GungHo)
Sumioni (Acquire)
Wii U
E3 2012 - June 5th, 2012
Tank Tank Tank (Bandai Namco)
Tekken Tag Tournament 2: Wii U Edition (Bandai Namco)
Ninja Gaiden 3: Razor's Edge (Koei Tecmo)
Nintendo Direct - September 13th, 2012
Warriors Orochi 2: Hyper (Koei Tecmo)
Romance of the 3 Kingdoms XII (Koei Tecmo)
Ken's Rage: Fist of the North Star 2 (Koei Tecmo)
Monster Hunter 3G HD Version (Capcom)
Announcements outside of these events
Dragon Quest X
PlayStation 4
E3 2013 - June 10th, 2013
Final Fantasy XV (Square Enix)
Kingdom Hearts III (Square Enix)
Final Fantasy XIV (Square Enix)
Pre-TGS Conference (September 9th, 2013)
Yakuza: Ishin! (SEGA)
Natural Doctrine (Kadokawa Games)
Guilty Gear Xrd Sign (Arc System Works)
Lily Bergamo (GungHo) -> disappeared, then became Let it die
Announcements outside of these events
Dynasty Warriors 8 with Extreme Legends (Koei Tecmo)
Nobunaga no Yabō Online: Tenka Mugen no Shōu (Koei Tecmo)
Metal Gear Solid V: Ground Zeroes (Konami)
Metal Gear Solid V: The Phantom Pain (Konami)
Nintendo Switch
Switch Presentation - January 12th, 2017
Super Bomberman R (Konami)
Dragon Quest Heroes I-II for Nintendo Switch (Square Enix)
I Am Setsuna (Square Enix)
Puyo Puyo Tetris (SEGA)
Disgaea 5 Complete (NIS)
Nobunaga's Ambition: Sphere of Influence with Power Up Kit (Koei Tecmo)
Romance of the Three Kingdoms XIII with Power Up Kit (Koei Tecmo)
Project Octopath Traveler (Square Enix)
Ultra Street Fighter II: The Final Challengers (Capcom)
Dragon Ball Xenoverse 2 (Bandai Namco)
Minna de Waiwai! Spelunker (Square Enix)
Shin Megami Tensei title (Atlus)
Announcements outside of the event
Dragon Quest X (Square Enix)
Dragon Quest XI (Square Enix)
If there are errors, or if you want me to use other comparison's criterias, feel free to post your ideas and notes