the closest BRZ had with getting #1 was when they released Everlasting Luv / BAMBINO ~Bambino~ as that ranked in at #2
That's widely considered to be their best selling single as that single can be considered as the start of many awesome future experimental tracks in time to come & both A-sides had relatively strong good tie in's too
Somemore , Everlasting Luv / BAMBINO ~Bambino~ was released on DAIGO's 31st birthday & the single did ranked in at #1 for the 1st 2 days & you can imagine just how seriously happy DAIGO was & it made such a great birthday present for him
Even though at the end it didn't get #1 , who cares man , that was still great & they're #1 to me
they don't necessary need to get #1 for every release of theirs
Sounds corny but true but doesn't mean you get #1 on the Oricon , it means that it deserves to be anyway