A jacket with built-in fans, a road coating to rein in heat and factory mist sprayers were on offer at a trade fair in the Japanese capital, Tokyo, on Thursday as it struggles with record heat two years before it hosts the Summer Olympics. Summer in Japan has always been hot and humid, but a heat wave this year has brought unprecedented scorching temperatures in some areas, killing at least 14 in Tokyo since the start of July and sending thousands nationwide to hospital. The high in Tokyo was 34.8C, while in the ancient capital of Kyoto it stood at around 39.8C on the sixth straight day of temperatures at 38C or more, a level unseen since record-keeping began. With the heat wave expected to continue for at least one more week and perhaps even until month end, the products on display at the trade fair held out the prospect of relief. A jacket that cools the wearer had side panels carrying two built-in battery-operated fans, to draw in air, and help evaporate sweat. "It's so cool it f...

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