> While the nation is known abroad for minimalist lifestyles, their websites are oddly maximalist.
I’m not aware of this stereotype of Japanese minimalism. I guess there’s Marie Kondo, and some Japanese high-end dining tends towards minimalism. But then there’s manga, anime, kawaii, Nintendo, Sega, Miyazaki, etc., a lot of which is closer to maximalism than minimalism.
A subset of Japanese people use minimalism as a justification as lesser purchase power these days.
That said, I think the Japanese commercial ecosystem is still less wasteful than the one in the US except the excessive plastic wrapping. I hope one day they realize that won't count as "Omotenashi".
You also have wabi-sabi and all the other bits of Zen Buddhism we've imported.
Do not forget the Tokugawa tomb in Nikko. ;-)
Having attended a lot of conferences in Japan, I would have said signage and the like tends towards the amateur and garish. Which isn't inconsistent with what you wrote. I've always found Japan a weird mix of refined/minimalist and kitsch.