This usually implies a QWERTY keyboard with Japanese kana printed on the keys and a way to switch modes:

https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcSH1YLn...

Oh I see, it's US QWERTY with labelled kana, as opposed to the Japanese layout, which adds some extra keys specific to Japanese (mostly for IME use).

It's QWERTY with Kana. You can see a couple images here:

https://www.instagram.com/p/BAqh-TUpLh3/

https://www.instagram.com/p/BGGFILmpLsn/

Ah, that looks like the standard Japanese layout; it has the extra keys.