Japan 's Izumo takes receipt of newly-commissioned helicopter carrier . The ship , named the Maritime Self-Defense Force , is the largest Japanese military ship since the Second World War . Critics in neighboring countries say the ship could contravene Japan 's pacifist constitution .
Japan 's Maritime Self-Defense Force takes receipt of newly-commissioned helicopter carrier . The ship , named the Izumo , is the largest Japanese military ship since the Second World War . Critics in neighboring countries say the ship could contravene Japan 's pacifist constitution .