Heh, this is where this gets embarrassing... of course, they are common. They are so common that you end up losing track of them, hidden in plain sight. Lookin

Heh, this is where this gets embarrassing... of course, they are common. They are so common that you end up losing track of them, hidden in plain sight. Looking them up, I now discover they even have names: 湯桶読み(yutouyomi) and 重箱読み (juubakoyomi).