What's the name of the wooden window outside the Japanese window?

The wooden window outside the Japanese window is called a window lattice. This is an anti-theft window protection device, which is used to store and protect windows. It's made of iron, the same size as a window. You can pull it out. There will be two in it. This is a unique thing in Japanese wooden architecture. The windows of Japanese wooden houses are mostly plastic-steel push-pull type, so it is impossible to install iron railings outside the windows like China.