Nice! I wish we knew how many people bought the song though...I'm curious!

We might hopefully know on iTunes weekly charts (if a certain website will put the numbers up) like fellow users stated.

07/03 Update

Step by step still on the same position except on UTA chart...it's going up one position to position two...

^yay! :)

07/04 UPDATE

Step by step go down but still in the top 5.
Nishino Kana still the queen of digital chart, she going up on almost everything.

Step by step also got down to #5 on iTunes.

^already go down huh? but at least it will be on top 5 weekly chart

go Kana. moshimo is quite some days old by now and still charting on 1.

07/05 UPDATE

Step by step go down again some on the edge of top 5, some down to top 10
A ONE up to 42...I think the tour give it a boost.

^ A One has awaken again. Yay

Step by step was downloaded 11,955 times this week in iTunes Store (if the source is legit)

http://www.tnsori.com/20150713-itunes-topsongs-weekly

I think it's pretty legit. Natsu style does use the official oricon weekly singles each week as well.

Numbers are decent. We can see the drama isn't that popular unfortunately.
Sometimes I feel like the dramas benefits more using ayu than vice versa.
With some movies as well (Rule being more successful than the movie itself lol).

^But Natsu Style also does estimations about Oricon sales too, so this could be estimations as well

Yeah that Dragon Ball movie sucked but at least I got to listen to an ayu song on TV on my country :) I was so happy I wasn't even watching the movie

@AyuGAME you can check iTunes weekly numbers on Tieba Baidu Oricon every Tuesday :)
and thanks a lot for this initiative, I always wanted to do this but I'm not having much time these months :(

07/06 UPDATE

Up on RBT and stay on most of the chart...

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ayumisrael - I agree...Ayu song help the dorama, not the dorama help Ayu. Except for Saigo Kara...I think it did help Ayu.
brener - I would love to...but sometime I got headache when opened that website...it's confuse me...

Baidu is using the Natsu Style estimations themselves. :) They don't have any official real numbers either.

Anyway I'm glad to see the single did well first week! If only Ayu would perform at some of the summer TV specials it could be one of her biggest hits in a long time.

Natsu Style does daily estimations, not weekly, when the weekly is out so they post the official one.

Ohhh, the numbers are nice!

The weekly ranking are out !

The full song is 3rd# and the chaku uta version is 4th# !

Of course it's her best ranking since years ... Probably since How beautiful you are in 2012 !

07/07 UPDATE

Step by step did well on weekly chart...I thought she can get number one on RBT but I was wrong she ended up in position 2...
On daily chart she still in the top 10 on every chart...
Here we go Step by step week 2...hope it can hold it's position.