Literally everytime a game comes out and underperforms at least one person comes and makes this senseless excuse and it's literally proven wrong everytime.

Sorry, but unfortunately no. 

Destiny (PS3) did 50k FW and Yokai was doing 47k (both versions), so it is very possible that this is sitting at 30k, or under. 
HyWa did 70k FW and needed 3 more weeks to close 100k. If this game follow suit, it will be at 50k by the end of the month.

Well, i will get it day one anyway. It looks great.

Makes you wonder if it will ever stop.  It should be common sense that a new game is usually going to sell the most in the first two days of its release.  Unless it has great legs or supply issues, of course.

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dont do this to yourself

bayonetta bombed period, move on

But this only reflects one or two days of sales!

Bayonetta came out on the 20th, and the Tsutaya rankings ended on the 21st. I mean... Seriously? Are you really going in this direction?

Are you really going in this direction?

Every_single_time a game underperforms we get these same excuses.  And every_single_time it's proven wrong because that's not how game sales work.

Let me illustrate this with an example:

Wonderful 101 released on August 24th, 2013.  Tsutaya rankings closed on August 25th, 2013.

Wonderful 101 charted at #16 in that week's chart:

http://gamrconnect.vgchartz.com/thread.php?id=167035

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  The Wonderful 101

  WiiU

This translated to ~ 6k Japanese sales that week:

http://www.vgchartz.com/game/72209/the-wonderful-101/Japan/

So based on the logic of "it's only a day's worth of sales", the second week should have been particularly strong, right?

It dropped by 50% in the second week, then slowly frittered away into selling in 3 digits by the 5th week.

So, as was obvious from the first week's sales, the game was a bomb.

The situation will be exacerbated for Bayonetta because it's an existing IP rather than a new IP.  A large amount of people will already know whether they like this kind of game or not having played the first game.

So please, for the love of the mental health of people like myself who visit Japanese sales threads every week, PLEASE stop coming in here and saying "but it's just had 1/2/3 days worth of sales, we can't judge anything by that!", because it just isn't an important factor.

As a side note, if you're going to play the "but Wonderful 101 sold 50k LT sales based on that VGChartz link you gave me!" card, keep in mind what price those copies were sold at.  The game was dumped in the bargain bin quickly.  It might be a better "number" worth of sales, but it's still a bomb because the copies were sold so cheaply.

But this is only 1 very extreme example. The Wonderful 101 didn't even chart in the top 10. This is a pretty awful example.

Find me an example that proves what you're saying is correct then.  I've just provided you with an example that shows what you're saying is wrong.