I’m not sure they really like to stand in line, but they do like to travel to well-known spots. And well-known spots can be quite busy (especially on Sundays).
Also, the Japanese are very patient people and very calm. Maybe some will be angry, but they won’t display it to the others around them often. It’s rare to see loud, angry Japanese people in Japan.
And of course, some may tolerate standing in line better than others but I suspect that most don’t actually enjoy it.
Honestly, most of the time there just isn’t any choice. It’s either wait patiently, get angry about it, or not wait at all.
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