The title is in Japanese. It means: 7 shironeko (7 white cats)…which is not true in this instance! Perhaps the translation is imprecise.
Comment: The first point to make is that there is no reason why I can’t have a title to an article in Japanese or any other language. The world is a family of different nationalities and I should not be stuck on English. The second point is that this is a very carefully constructed video which (1) gives Westerners a clue as to the sort of domestic cat that you see in Japan. They are a little bit different in terms of their liking for domestic cat appearance and (2) domestic cats love those tight spaces. The love the pressure against them and these plastic baskets are small relative to the size of the cats. They look too small but they are probably the right size which is instructional to anybody who wants to buy a cat bed. I believe that domestic cats like the reassurance that the tight fit gives them. The small cat beds might have a similar effect to a cat calming product called the Thundershirt. Sometimes cats snooze in bathroom sinks for the same reason. They are tight fits. Maru is a cat in Japan who likes a tightfitting box as well. There is one other point..(3) the calmness of the cats is noticeable. Is the video maker using artificial phermomones?
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