Cube Docs
From The Iwane Empire
As of leaving Shiro Kaiu, the team had 7 boxes of normal style, which enabled traveling to Toshigoku and Yomi.
In Ryoko Owari Minku acquired an exact duplicate of an existing box, but with the inverted style described by Bal, and which Minku sussed the name out as exactly the same as the duplicate box, but 'rotated 180 degrees moonward'.
At the first major boat stop up the river, Minku found another box of normal style, and Umi discovered another box of moonward style, neither of them exact duplicates of a currently held box.