In reality, broadly speaking, only two are used – Japanese short-grain (‘uruchimai’) for most everyday cooking, and glutinous rice (‘mochigome’) for sweet dishes such as mochi.
That said, feel free to make do with lukewarm or even leftover rice as long as it's convenient for your routine. If possible, use Japanese short-grain rice for a sublime stickiness and subtle ...
Rice is in short supply at supermarkets in Japan ... factors have impacted both supply and demand of the nation's staple grain. A supermarket in Tokyo has put up signs: 'Sales limited to one ...