Xbox in Japan is selling all they send.

Also I think it's fair to note that Game Pass didn't launch in Japan until 2020? I think? Or maybe it was end of 2019, so that might be a reason.

Demon Slayer on PS5 only around 1/5th of the PS4 version, with 40-60% sell through.
The curse of PS5 software in Japan goes on. Looking at COMG it might continue for quite some time.

Famitsu Third Party Top 50 2021(Known Sales)

1. [NSW] Monster Hunter Rise (Capcom) - 2.326.057
2. [NSW] Momotaro Dentetsu (Konami) - 1.159.803
3. [NSW] Minecraft (Microsoft) - 531.892
4. [NSW] Story of Seasons: Pioneers of Olive Town (Marvelous) – 281.140
5. [NSW] Monster Hunter Stories 2 (Capcom) - 227.554
6. [PS4] Tales of Arise (Bandai Namco) - 213.474
7. [NSW] Baseball Spirits 2021 (Konami) - 195.906
8. [PS4] Resident Evil Village (Capcom) - 191.983
9. [NSW] Crayon Shin-Chan (Neos) - 183.733
10. [PS4] NieR Replicant (Square Enix) - 158.265
11. [PS4] Lost Judgement (Sega) – 145.788 
12. [NSW] Bravely Default II (Square Enix) – 136.091
13. [NSW] Rune Factory 5 (Marvelous) - 127.968
14. [NSW] Yu-Gi-Oh! Rush Duel (Konami) - 127.221
15. [NSW] Fitness Boxing 2 (Imagineer) - 115.375
16. [NSW] Dragon Quest XI S (Square Enix) - 111.811
17. [PS4] Demon Slayer: Kimetsu no Yaiba (Aniplex) - 94.849 NEW
18. [NSW] Tsukihime (Aniplex) - 89.916
19. [NSW] Human Fall Flat (Teyon Japan) - 85.310
20. [PS4] Tsukihime (Aniplex) - 80.042
21. [NSW] Little Nightmares II (Bandai Namco) - 72.796
22. [PS4] Samurai Warriors 5 (Koei Tecmo) - 72.727
23. [NSW] Taiko no Tatsujin: Drum 'n' Fun! (Bandai Namco) - 70.964
24. [NSW] Fishing Spirits (Bandai Namco) - 68.180
25. [PS5] Resident Evil Village (Capcom) - 67.210
26. [NSW] Sakuna: Of Rice and Ruin (Marvelous) - 65.620
27. [NSW] Hyrule Warriors: Age of Calamity (Koei Tecmo) - 62.119
28. [NSW] Samurai Warriors 5 (Koei Tecmo) - 61.350
29. [NSW] Dragon Ball Z: Kakarot (Bandai Namco) - 61.173 
30. [PS5] Tales of Arise (Bandai Namco) - 60.106
31. [NSW] Minecraft Dungeons (Microsoft) - 59.256
32. [PS4] The Legend of Heroes: Trails in the Dark (Nihon Falcom) - 58.391 
33. [PS4] Judgment [New Price Edition] (Sega) - 53.086 
34. [PS4] Far Cry 6 (Ubisoft) - 44.136
35. [NSW] Mario & Sonic at the Olympic Games (Sega) - 40.688
36. [PS5] Lost Judgment (Sega) - 36.584
37. [NSW] Puyo Puyo Tetris 2 (Sega) - 36.105
38. [PS4] FIFA 22 (Electronic Arts) - 35.348 
39. [NSW] Family Trainer (Bandai Namco) - 35.273
40. [PS4] Scarlet Nexus(Bandai Namco) - 31.665
41. [PS5] Final Fantasy VII Remake Intergrade (Square Enix) - 30.984
42. [PS4] Biomutant (THQ Nordic) - 30.292
43. [NSW] Densha de Go!! (Square Enix) - 29.624
44. [NSW] Apex Legends: Champion Edition (Electronic Arts) - 29.057
45. [NSW] eBaseball Powerful Pro Baseball 2020 (Konami) - 27.539
46. [PS5] Judgement [New Price Edition] (Sega) - 26.292
47. [NSW] Disgaea 6: Defiance of Destiny (Nippon Ichi) - 25.744
48. [NSW] Jack Jeanne (Broccoli) - 25.518
49. [PS4] Little Nightmares II (Bandai Namco) - 24.968
50. [NSW] FIFA 22: Legacy Edition (Electronic Arts) - 22.381

NSW - 31   PS4 - 14  PS5 - 5

TOTAL: 7.949.354

TOTAL NSW: 6.493.164 (81.7%)

TOTAL PS4: 1.235.014 (15.5%)

TOTAL PS5: 221.176 (2.8%)

First time I'm including Aniplex in the mix, this has helped PS4/PS5 rise to nearly 19% of the total third party sales. Next week third parties will surpass 8 million units within the unofficial Top 50. 

Top 10 Publishers: 

1. Capcom - 2.812.804 (35.4%)
2. Konami - 1.510.469 (19%)
3. Bandai Namco - 638.599 (8%)
4. Microsoft - 591.148 (7.4%)
5. Marvelous - 474.728 (6%)
6. Other - 471.552 (5.9%)
7. Square Enix - 466.775 (5.9%)
8. Sega - 338.543 (4.3%)
9. Aniplex - 264.807 (3.3%)
10. Koei Tecmo - 196.196 (2.5%)
11. Neos - 183.733 (2.3%)

Next few weeks we will see how Super Robot Wars 30 does on the PS4/Switch, should have no problem surpassing 200K lifetime across the two ecosystem based on current pre-orders. Shin Megami Tensei V is the biggest third party title launching for the remainder of the year a good result for it would be a launch of above 175K physical. Finally we also Power Pro Kun Pocket R which is another game I expect to surpass 150K lifetime this holiday. I don't really see another third party game surpassing 150K but there is a lot of titles that should enter the Top 50 with lower sales. 

Super Robot Wars:

[PS4] Super Robot Wars T - 80.528 / 105.703

[NSW] Super Robot Wars T - 38.218 / 53.810

TOTAL: 118.746 / 159.513

[PS4] Super Robot Wars X - 84.550 / 112.753

[PSV] Super Robot Wars X - 55.397 / 73.419

TOTAL: 139.947 / 186.172

[PS4] Super Robot Wars V - 95.222 / 111.975

[PSV] Super Robot Wars V - 84.933 / 128.945

TOTAL: 180.155 / 240.920

A great result for Super Robot Wars 30 would be a debut above 150K straight out of the gate, no SRW game has managed this since SRW V in 2017 when Vita was still actively supported. I'm personally expecting this to happen as the game has been performing well in terms of pre-orders. In terms of lifetime sales I can see the Switch version being the one that ends up selling more although at launch PS4 should come ahead. 

PS5s weirdly low software attach ratio is gonna continue for a while. It probably will not come into its own until late 2022

The demand for PS5 is unprecedented and Sony's estimates are not matching it. 16M this year and 23M next year. If its still supply constrained after selling 23M then wow.

With the chip supply issues going on, I'm not sure they can even get to 23M if they wanted

If COMG is any indication, the sales split will be way closer than Robot Wars T; the Switch has grown a lot in the two and half years since then. It's a series with a deeper established history on the PS ecosystem, but the Switch's greater popularity in Japan should go a long way towards counteracting that.

I don't think PS5 software sales are weirdly low.  I think PS5 hardware sales are weirdly high.  That explains the weird attach ratio.  

Assuming the PS5 sales are mostly due to scalpers, they should have a noticeable decline in hardware sales during the early part of next year.  Once we get past holiday sales, the scalpers in Japan will focus more on OLED instead of PS5.  Of course, if PS5 sales in Japan stay good for all of next year, then I have to conclude that it isn't just scalpers causing most of its sales.  However, right now I'm assuming it's scalpers.

This is nonsensical. Scalpers buy high-demand products because they know people are desperate to get them and willing to pay above RRP. Suggesting that if scalpers didn't buy them the PS5 sales would be less and would be readily in-stock is illogical. If that were true then the scalpers would be getting more PS5's then they can sell and they would have stopped buying. It makes zero sense.

Scalping only exists for products that would actually sell-out if there was no scalping.

Yeah, scalpers do not buy products that are not popular. If they did, they would be bad scalpers.

23M was their prediction so they've probably already got the chip line allocated for it.