The Microsoft brand was never that strong in Japan so hearing these numbers about the first week sales of the Xbox One over there isn't that surprising.
Famitsu is reporting for the dates of September 4th through September 7th, the Xbox One sold 23,562 consoles. The largest selling game was Titanfall at 22,416 copies, but bear in mind that that includes the number for the Xbox One bundles that included it.
If you wanted to know how many units the Xbox 360 sold in it's first few days in Japan, that would be 60,000 and that was done in 2 days. The PlayStation 4 and the Wii U did 900% better in its first week with both selling around 200,000 units.
You can't fault Microsoft for trying, but it doesn't look good for the Xbox One over there.