Something that I have noticed while flipping Jap food magazines is that the focus has shifted to warm comfort food for winter. And earthern pot dishes seems to be one of them.
なべもの(鍋物) Nabemono - A class of dishes cooked at the table and served from the pot direct. (From A Dictionary of Japanese Food by Richard Hosking)
Well, I didn't cook my nabe at the table but instead on the stove and then we eat at the table out of the pot. The food keeps warm until we were almost three quarter way.