Indeed, I don't even know any Japanese people that use the kana keys. I don't know the recent data but in 2009 there was a study that found only 12% of Japanese people used kana input.

Something that is disappointing about these keycaps is that they mostly only make these for US keyboard layouts not actual Japanese keyboard layouts. I have a Japanese keyboard that the keys were getting worn on and something like this seems like it would be a good replacement but it isn't because several of the keys that aren't letters such as shift characters on numbers and other special characters are labeled wrong for a real Japanese keyboard.

There are some Japanese layout replacement keycaps but the selection is very limited compared to how many of these stylistic kana keycaps they make for US layouts. I cringe a little bit every time I see these keycaps. I mean I get it, but still.

I couldn't find け or む on this keyboard...