I've actually reviewed these on Behind The Dumb Episode 4. They're chocolate mushrooms. They're also Kinoko No Yama, or "Mountain of mushrooms" according to Google Translate. You don't really get a whole mountainful in the package, but you get a decent number. I think Behind The Dumb pretty much explains it all, but for a semi-transcript: These are short little Yan-Yan sticks about an inch long, and the top half of the stick is covered with a mushroom-cap-shaped blob of chocolate. So really simple, chocolate and cookie, and it looks like a mushroom.|
They're not my favorite for one simple reason: the chocolate is a little bit dark. Not super dark by any means, and not as dark as Chocolate Wheat Puffs, but a hint of bitterness in there that I don't want. I'm happier with all the other wheat+chocolate Japanese options, like Chococone, Hello Panda, Pucca, Pocky, and so on. So in the end, I will eat these if I'm trapped on a desert island, and at the moment I'm trapped on just such an island - an island made of these being the only chocolate-based candies I have left. So I'm eating them. But I'm protesting it. 7.5/10 Yums.