I went to a friend’s birthday party yesterday in Kita-Kamakura on the JR Shonan-Shinjuku line. It takes 57 minutes from Shinjuku Station.
Thankfully, the weather had cooled considerably by dusk, as the friend’s house is a very stiff 15-minute climb up the side of the valley that encloses the settlement there.
On the way up I noticed that truest of all harbingers of the Japanese summer: a freshly planted rice field. Once I got to the party, another guest told me that he had actually seen it being planted when he had passed by a few hours before.
The Japanese language is rich in terms regarding rice.
Also, you can read about the history of rice in Japan.