As mentioned in earlier threads, when landing to the north in NRT, you are supposed to have your gear down before the shoreline 'in order to prevent ice blocks falling from aircraft onto the ground'.
I believe the 'ice blocks' are the stowaways who used to fall onto beachfront property in Sanbu on gear extension.
Legend has it years ago, a B727 FE noticed the aft cargo light come on and then go out just as they were ready to enter the active runway for takeoff one night from a down south destination. Word was an 'inside job' took place as a few million dollars of a cash shipment was in that aft cargo and was 'liberated', and spirited off the grounds of a dark airport area.
This type of robbery has occured several times over the years I believe. Like bank embezzlement often the crime is not publicized.