Japan - The best-selling games of 2018 so far

1. Monster Hunter World (PS4) - 1,949,592
2. Splatoon 2 (Switch) - 631,298
3. Kirby Star Allies (Switch) - 536,881
4. Mario Kart 8 Deluxe (Switch) - 450,206
5. Super Mario Odyssey (Switch) - 389,680
6. The Legend of Zelda: Breath of the Wild (Switch) - 292,459
7. Pokémon Ultra Sun Moon (240,135)
8. Jikkyou Powerful Pro Baseball 2018 (PS4) - 217,178
9. Mario + Rabbids Kingdom Battle (Switch) - 200,131
10. Donkey Kong: Tropical Freeze (Switch) - 179,179
11. Nintendo Labo: Toy-Con 01 - Variety Kit 174.792 [174.792] Nintendo
12. Fist of the North Star: Lost Paradise 174.744 [174.744] SEGA
13. Dynasty Warriors 9 171.195 [171.195] Koei Tecmo
14. Mario Party: The Top 100 153.015 [199.203] Nintendo
15. Dissidia: Final Fantasy NT 150.250 [150.250] Square Enix
16. Far Cry 5 144.455 [144.455] Ubisoft
17. Sword Art Online: Fatal Bullet 126.585 [126.585] Bandai Namco
18. Mario Tennis Aces 122.070 [122.070] Nintendo
19. Dark Souls: Remastered 112.974 [112.974] From Software
20. Super Robot Wars X 107.866 [107.866] Bandai Namco

As you can see, Nintendo is killing it overall in Japan this year. The real success story here are the Switch titles that launched in 2017 and continue to dominate this year. Just look at how many units Splatoon 2 moved this year, and then consider the game launched July 2017!