Nintendo Switch Golden Week Sale for the Japanese region Nintendo eShop
list below (everything is 30% off unless stated otherwise):
Super Mario Odyssey
Mario Kart 8 Deluxe
Kirby Star Allies
Mario Tennis Aces
Taiko no Tatsujin: Drum ‘n Fun! (25% off)
Together! The Battle Cats (22% off)
Dragon Quest Builders 2
Dragon Quest Builders 2 + DLC Pack 1 and DLC Pack 2 (24% off)
Dragon Quest Builders (40% off)
GO Vacation
Octopath Traveler
Fitness Boxing (20% off)
1-2 Switch
Puyo Puyo Tetris
Hyrule Warriors: Definitive Edition
Fire Emblem Warriors
Fire Emblem Warriors Budget DLC Pack
Donkey Kong Country: Tropical Freeze
Tales of Vesperia: Definitive Edition (20% off)
Katamari Damacy Reroll
Valkyria Chronicles (10% off)
Civilization VI (25% off)
LEGO Marvel Super Heroes 2 The Game (19% off)
Billion Road
Othello (50% off)
Disgaea 5
https://topics.nintendo.co.jp/c/article/61e195c1-5f10-11e9-bf90-063b7ac45a6d.html