While the winter lasted for a split second, we are all set to welcome the summer season.
Get the person out of the sun and heat and into a cool place if possible, one that is air-conditioned.
Offer sips of fluids (except alcohol or caffeine). Water, sports drinks, and fruit and vegetable juices are best.
Like what I did last weekend. I went to Sendai station to look for something to drink and feel refreshed. I dropped
by in a shop that offers a nice float. I had a tropical ice cream float topped with manggo chunks. The drink was so
delicious and refreshing.
This is the better way to beat the summer heat of Japan. 
JOHN