dd-wrt has now been official released for this type. right now we can just provide web upgrade images for buffalo devices for EU/US. buffalo doesn not want that we release flashable images for japanese routers at this time
To continue setup, perform the following procedure.
1. Close all browser windows.
2. Confirm that a connection between the computer and the router is established.
3. Reopen the browser and reconnect using the AirStation Configuration Utility.
Refer to the user manual for more information.