Didn't see some of these titles mentioned anywhere while they're pretty big and there's also a North American Lineup thread, so.
Here's the full Japanese Nintendo Switch lineup, taken from the official website:
Launch (March 3):
The Legend of Zelda: Breath of the Wild
Nobunaga's Ambition: Sphere of Influence with Power Up Kit
I Am Setsuna
Puyo Puyo Tetris S
Disgaea 5
Super Bomberman R
Dragon Quest Heroes I & II
1-2-Switch
March:
Snipperclips
Romance of the Three Kingdoms 13 with Power Up Kit
April 28:
Mario Kart 8 Deluxe
Spring:
Minna de Waiwai! Spelunker
ARMS
Summer:
Splatoon 2
Winter:
Super Mario Odyssey
2017:
Xenoblade 2
TBD:
Dragon Ball Xenoverse 2
Newest title in Shin Megami Tensei series
Project Octopath Traveler
Ultra Street Fighter II: The Final Challengers
NBA 2k18
BlazBlue
FIFA
Sonic Mania
Dragon Quest XI
Dragon Quest X
Fire Emblem Musou (Warriors)
Project Sonic 2017
Derby Stallion
Taiko no Tatsujin
Arcade Archives
"Tales of" series
Story of Seasons (Harvest Moon)
The Elder Scrolls V: Skyrim
Minecraft
Here's the full Japanese Nintendo Switch lineup, taken from the official website:
Launch (March 3):
The Legend of Zelda: Breath of the Wild
Nobunaga's Ambition: Sphere of Influence with Power Up Kit
I Am Setsuna
Puyo Puyo Tetris S
Disgaea 5
Super Bomberman R
Dragon Quest Heroes I & II
1-2-Switch
March:
Snipperclips
Romance of the Three Kingdoms 13 with Power Up Kit
April 28:
Mario Kart 8 Deluxe
Spring:
Minna de Waiwai! Spelunker
ARMS
Summer:
Splatoon 2
Winter:
Super Mario Odyssey
2017:
Xenoblade 2
TBD:
Dragon Ball Xenoverse 2
Newest title in Shin Megami Tensei series
Project Octopath Traveler
Ultra Street Fighter II: The Final Challengers
NBA 2k18
BlazBlue
FIFA
Sonic Mania
Dragon Quest XI
Dragon Quest X
Fire Emblem Musou (Warriors)
Project Sonic 2017
Derby Stallion
Taiko no Tatsujin
Arcade Archives
"Tales of" series
Story of Seasons (Harvest Moon)
The Elder Scrolls V: Skyrim
Minecraft