There have been quite a few retailer incentive items in Japan in the last year, and October has another set.
This time they are weapons, and many of us in western markets will recognise them as Beast Hunters weapons - which Japan didn't get with their Arms Micron/GO toys.

Prime Axe, a redeco of the axe that came with Beast Hunters Dreadwing. Available at Toys R Us Japan
Tricera Mace, a redeco of the mace that came with the Deluxe Beast Hunters Windrazor. Availability to be announced...
Spino Hammer, a redeco of the drill hammer that came with the Deluxe Beast Hunters Twinstrike. Available at (amongst others) Edion, Best Denki toy counter, Yamada Denki toy counter, and Yodobashi Camera
Ptera Spear, a redeco of Prime Knock Out's spear. Available at Bic Camera, Joshin Kids Land and Kojima Co., Ltd. toy counter