I love finding those products from Japan that make me pleasantly shake my head and think, "only the Japanese would do this" and then secretly want to buy it.
Here are a few of my favorites.
Sushi Game. They also have a bizarre train version where you pluck sushi off of a toy train with chop sticks. Instructions are in Japanese though.
Ice Ball Maker. For those who don't care to learn how to turn an ice ball by hand. Just warm the cylinder and let gravity make the ice sphere.
Makki Maker for Kids. I'm sure American kids might have a tougher time with this.
And just because my wife's a radiologist, this wooden toy MRI makes me laugh. They have a wooden toy for almost every medical imaging device it seems.