Japan's summer is very bad for bikes, because of high temp and high humidity.
It rusts and corrodes bikes.
Garage, barn, shed, they aren't ideal places.

Storage in the house is best.
But Japan's houses are notorious for too small, once called "rabbit hutch".
We need a space saver like this one, MINOURA P-500AL-6S pair stand.
My wheels are in the Ostrich's wheel bags.