I guess I'm remembering the timeline of announcements differently. That and they had stronger western support, which are stronger titles in Japan these days, like Call of Duty and Grand Theft Auto.
But even then, Swutch is/expected to be the leading platform this gen, like 3DS, but isn't getting that level of support.
Oh yeah, the big western publishers were there day one for PS4/XB1 with crossgen support and remasters, and it majorly paid off for them. Switch is a stark contrast in comparison with only Bethesda and (sort of) Take 2 really showing up to the same degree. Ubisoft, EA, WB, Nordic and (especially) Activision all slept on Switch but I expect them to show up in force next year comparably. The west seems able to ramp up quicker than Japan these days.
As for announcements, this is what the bigger Japanese pubs had 7 months in. Theyre honestly very comparable if not favorable for Switch, people are forgetting just how slow Japan was to move to next gen consoles.
Bandai Namco
PS4+XB1
Mobile Suit Gundam series (PS4 only, announced)
The Idolmaster series (PS4 only, announced)
Switch
Dragon Ball Xenoverse 2 - Nintendo Switch Version
Namco Museum
One Piece Unlimited World Red - Deluxe Edition
Pokkén Tournament DX (Nintendo published)
Taiko no Tatsujin series (announced)
Tales of series (announced)
Capcom
PS4+XB1
Dead Rising 3 (XB1 only, western dev)
Deep Down (announced)
Strider (western dev)
Switch
Monster Hunter XX - Nintendo Switch Ver.
Resident Evil Revelations (announced)
Resident Evil Revelations 2 (announced)
Ultra Street Fighter II: The Final Challengers
Koei Tecmo
PS4+XB1
Dynasty Warriors 8 Empires (announced)
Dynasty Warriors 8 Xtreme Legends - Complete Edition (PS4 only)
Dynasty Warriors Online Z (PS4 only, announced)
Nobunaga's Ambition: Sphere of Infuence (announced)
Nobunaga's Ambition Online: Tenka Mugen no Shou (PS4 only, announced)
Samurai Warriors 4 (PS4 only, announced)
Warriors Orochi 3 Ultimate (announced)
Switch
Atelier Lydie & Suelle: The Alchemists and the Mysterious Paintings (announced)
Attack on Titan 2 (announced)
Champion Jockey Special
Dynasty Warriors 8 Empires (announced)
Fire Emblem Warriors (Nintendo co-published)
Nights of Azure 2: Bride of the New Moon
Nobunaga's Ambition: Sphere of Influence with Power-Up Kit
Nobunaga's Ambition: Taishi (announced)
Romance of the Three Kingdoms XIII with Power-Up Kit
Samurai Warriors: Spirit of Sanada (announced)
Winning Post 8 2017
Warriors Orochi 3 Ultimate (announced)
Konami
PS4+XB1
Metal Gear Solid V: Ground Zeroes
Metal Gear Solid V: The Phantom Pain (announced)
Pro Evolution Soccer 2015 (announced)
Switch
Super Bomberman R
Level 5
PS4+XB1
Wonder Flick (announced)
Switch
support confirmed (Inazuma Eleven Ares all but confirmed)
Sega
PS4+XB1
Alien Isolation (announced)
Yakuza Ishin! (PS4 only)
Switch
Phantasy Star Online 2 Cloud (announced)
Puyo Puyo Tetris
Shin Megami Tensei HD Project
Sonic Forces (announced)
Sonic Mania (western dev)
support confirmed (Sega CS1/Yakuza Studio)
Square Enix
PS4+XB1
Final Fantasy XIV Online: A Realm Reborn (PS4 only)
Final Fantasy XV (announced)
Kingdom Hearts III (announced)
Murdered: Soul Suspect (western dev, announced)
Thief (western dev)
Tomb Raider: Definitive Edition (western dev)
Switch
Dragon Quest X Online
Dragon Quest XI: Echoes of an Elusive Age (announced)
Dragon Quest Builders (announced)
Dragon Quest Builders 2 (announced)
Dragon Quest Heroes III for Nintendo Switch
Fear Effect Reinvented (western dev, announced)
I am Setsuna
Lost Sphear
Project Octopath Traveler (announced)
Seiken Densetsu Collection
Spelunker Party!