Hobby websites released these 2 items 2 days earlier, on the 4th.
Super Robot Chogokin Mazinger Z - 3,675 Yen (inclusive of tax).
Weapon Set for Super Robot Chogokin Mazinger Z - 1,050 Yen (inclusive of tax).
Special counter outside Sofmap AM Hall in Akihabara just for these two items.
The special rock type display base is the special prize for the first batch production of Super Robot Chogokin Mazinger Z. More images in this previous posting.
On a separate note, one Gundam item was released yesterday as well, but not from Tamashii Nation. It's one of the three Gundam prize items for August from Banpresto - Super Size Soft Vinyl Figure Gundam RX-78-2.
35cm tall. ^^
Images are from Moeyo.