Hitachi Ltd.¡¯s agreement to buy the rail signaling business of Italy¡¯s Finmeccanica SpA in its largest overseas purchase ever will boost the company¡¯s European manufacturing base, increasing competition for the train units of Siemens AG and Alstom SA.

The European train-makers posted stagnant profits in recent years amidst rising Asian competition and constrained public investments in their home markets.

Hitachi, which builds key parts of Japan¡¯s bullet trains, is seeking growth abroad and European orders for express and commuter trains.