That is interesting market feedback.
It means there are slower moving items in the retail side in Japan.
But the way the business works is that Bandai allocates its stock between Japan retailers, Asia retailers, online shops, and major international licensers (like Bluefin and similar outfits around the world). Once the allocation is done, the product is off of Bandai's hands. Any slow sellers are basically the problem of the retail groups. The allocations are not always ideal in the mind of these various retail groups, because they have to buy the good with the bad in most cases.
For a small manufacturer like Evolution, a slow seller can kill their business, but a giant machine like Bandai has more leverage.
That does not mean Bandai can keep churning out slow sellers, it just means they have more time and market power.