a nonvolatile memory including a plurality of blocks; and

a controller configured to write, in response to receiving from the host a write command specifying a logical address, data received from the host to a first write destination block allocated from the plurality of blocks, wherein

the controller is configured to:

manage a first list and a first storage location information, the first list including a plurality of logical addresses corresponding respectively to write-uncompleted data that have been received from the host and have not been written to the first write destination block, and the first storage location information indicating a storage location at a beginning of a write-uncompleted region in the first write destination block for which writing of data have not been completed; and

in a case where a power loss has occurred in which supply of power to the memory system is shut off without notice from the host, write the first list and the first storage location information to the nonvolatile memory using power from a capacitor that stores power to be supplied to the memory system.