A big cold
northerly air mass collides with a warm southerly
one. The former slips into the other, forcing it
aloft; this causes making up a composite front over,
roughly, Shimane and the neighboring prefectures.
Because either of the two different masses is as
powerful as the other, the act remains stationary
for a long duration, the tsuyu mentioned above. The
tsuyu usually ends in the middle of July in Shimane.
Then full summer begins. The summer is sweltering
and humid, but the green leaves around are so