Those are "grills". If you want to bake stuff, you can get real ovens, but they're fairly small, and not built into the apartment, and usually combined with a microwave oven. Any decent appliance store sells them for around 30,000 yen. You're not going to cook a turkey in it, but if you want to bake a small cake it's perfect.

Yes, unlike Americans who apparently absolutely need to bake a whole turkey on a regular basis, Japanese don't normally bake stuff at home, so Japanese homes (at least in the big cities) don't normally come with built-in ovens. There's no space in Tokyo apartments for the comically-large ovens that are common in America, and the cuisine people make here doesn't normally need one, just a stovetop. For baked goods, people usually just buy them at the grocery store or bakery or other specialty shop.