The purpose of the present invention is to provide a technique to duplicate and translocate any large region in a chromosome of a fungus belonging to Aspergillus across a wide range, so that it will possible to stably and systematically acquire an Aspergillus strain having a novel trait, which was un-acquirable by conventional techniques. This enables the side beam to be decoupled from the axle-box, thereby reducing the stresses at the interfaces between these parts when the bogey frame moves transversely and vertically relative to the axles. Each of the P-type and N-type doped regions may be formed over a thin dielectric layer.