Geta are traditional Japanese sandals. They are made out of wood. They are held on the foot with a fabric thong. They are worn with traditional Japanese clothing (kimono, yukata) as well as western style clothing in the summer because they are comfortable and are easy to put on like sandals.
Kimono is traditional Japanese clothing worn by both men and women. Womens kimono is usually colourful and mens kimono is usually a plain pattern and darker colours. Kimono often have 3 or more layers, but today you can just only wear 2 layers minimum.