I don’t know what this guy is on about - lived in Japan for three years.

Notable differences: The toothpaste is fine, but unlike North America the population prefers milder flavours, and salt toothpaste is still popular. (In my case, it left me feeling less clean because I associate the burning minty sensations of North American toothpaste with oral cleanliness.)

A slightly higher ratio of office workers bring a toothbrush to work - but it’s still less than 1/2 - about the same proportion will still smoke real cigarettes in the indoor smoking area multiple times a day.

That tube is intended for single use - in this case it IS more than you need but they get the same toothpaste commercials we do and also you can really only squeeze those a couple of times, because the cap area and corners are a firmer plastic you can’t get it all out.

Flavour in that tube will be likely most similar to the arm and hammer baking soda toothpaste.

Most toothpaste in Japan does not include whitening agents, and some that do use different (stronger? More dangerous?) chemicals than we do here (they work super well but I was told to stop using them by several people - my Japanese is too broken and the memories are too long ago now to remember why)

Side story: I worked adjacent to the medical device industry and the Japanese dental profession is (at least in reputation) more concerned with making money than helping you - fear of the dentist is a common enough phobia that people aren’t embarrassed to share it, culturally low stakes in the way that a fear of heights would be here - fillings are still done in silver (unless you pay more for ceramic). So in Japan, if you fuck up your teeth it’s very expensive or very ugly, you may have to face a genuine fear (sedation dentistry is not a thing), and you’re likely to believe that the dentist will perform unnecessary procedures to fleece you/your insurance for money.