A magnetism detection device comprising: a transport path having a transport surface on which a coin is to be transported in a transport direction; detection coils arranged on at least one side of the transport surface of the transport path and along a direction crossing the transport direction of the coin; a controller configured to detect a magnetic feature of the coin based on an output signal; wherein the controller is configured to detect the magnetic feature of the coin based on the output signal from a subset of the detection coils comprising at least one but not all of the detection coils; and the magnetism detection device further comprises a substrate on which the detection coils are arranged, wherein the substrate has an opening, wherein the transport path is disposed to penetrate the opening of the substrate, and wherein the detection coils are mounted on the substrate, characterised in that the magnetism detection device further comprises an exciting coil configured to generate a magnetic field in the transport path, the detection coils include reflective detection coils arranged on a same side as the exciting coil relative to the transport surface and transmissive detection coils arranged on a side opposite to the exciting coil relative to the transport surface, and the controller is configured to detect the magnetic feature of the coin based on an output signal of a subset of the reflective detection coils comprising at least one but not all of the reflective detection coils and an output signal of a subset of the transmissive detection coils comprising at least one but not all of the transmissive detection coils. a transport path having a transport surface on which a coin is to be transported in a transport direction; detection coils arranged on at least one side of the transport surface of the transport path and along a direction crossing the transport direction of the coin; a controller configured to detect a magnetic feature of the coin based on an output signal; wherein the controller is configured to detect the magnetic feature of the coin based on the output signal from a subset of the detection coils comprising at least one but not all of the detection coils; and the magnetism detection device further comprises a substrate on which the detection coils are arranged, wherein the substrate has an opening, wherein the transport path is disposed to penetrate the opening of the substrate, and wherein the detection coils are mounted on the substrate, the magnetism detection device further comprises an exciting coil configured to generate a magnetic field in the transport path, the detection coils include reflective detection coils arranged on a same side as the exciting coil relative to the transport surface and transmissive detection coils arranged on a side opposite to the exciting coil relative to the transport surface, and the controller is configured to detect the magnetic feature of the coin based on an output signal of a subset of the reflective detection coils comprising at least one but not all of the reflective detection coils and an output signal of a subset of the transmissive detection coils comprising at least one but not all of the transmissive detection coils.