Just a reminder - this is Switch Sales in Japan during the holiday period 2017:
Week 46 2017: 86.999(+9%)
Week 47 2017: 145.200(+67%)
Week 48 2017: 124.770(-14%)
Week 49 2017: 164.908(+32%)
Week 50 2017: 221.210(+34%)
Week 51 2017: 269.684(+21%)
Week 52 2017:134.519(-50%)
Week 1 2018: 146.006(+9%)
TOTAL: 1.293.296
AVERAGE PER WEEK: 161.662
Now last year the only notable game release around this 8 weeks was Super Mario Odyssey which launched Week 43.
This year Week 46 coincided with the launch of Pokemon Lets Go, you have Smash Ultimate launching, Minecraft bundle launching, Super Mario Party JoyCon bundle launching, Dragon Quest Builders 2 launching... yeah 300K per week is a 100% increase YoY, so it would be difficult to envision those type of sales but in Japan I think momentum heading into 2019 will be much stronger. Games I outlined should help push the console and you have a bunch more games launching early 2019. Compare that to last year where you had Mario+Rabbids and Kirby as the only two games that launched during Q1 that sold well. There was certainly a drought of games up until March 2018 - when third party efforts started to ramp up a bit.