Surviving the Japanese Summer on the Golf Course: How to Prevent Heatstroke and the Best Cooling Gear to Stay Safe Playing golf in Japan is a world-class experience, featuring meticulously manicured fairways, deep cultural traditions, and luxurious clubhouse baths. However, if you schedule a tee time between late June and early September, you will face an entirely different challenge than just hazards and bunkers: the brutal Japanese summer. The Japanese summer is notorious for its extreme humidity and soaring temperatures, often exceeding 35°C (95°F) with humidity levels above 80%. This combination creates a high wet-bulb temperature, making it incredibly difficult for the human body to cool itself through sweat evaporation. On a wide-open golf course, where you are exposed to direct sunlight and radiating heat from the grass for four to five hours, the risk of heatstroke (known as netsuchusho in Japanese) is exceptionally high. To help you enjoy your round safely, this compreh...