Electronics retailer Yamada Denki has posted a 2.6% drop in net sales to ¥987bn (£8.04bn) for the first half. Operating profit rose 33.8% to ¥63bn (£518.3m), while net profit increased 44.6% to ¥40.9bn (£333.5m).

During the period the company introduced electric vehicles, solar panels, household lithium batteries and energy-saving equipment in its stores.