I visited the Little World Museum of Man with my family. Its admission fee was 1600 yen ($16.49 €12.50). Kids price was 600 yen ($6.19 €4.69).
According to their web site, the exhibition of the museum is;
Along a 2.5 km round road, there are many reconstructed traditional houses coming from all over the world. Here, you can enjoy a round trip of the world without a passport.
Here are photos of the museum;
Taiwan, Chinese Taipei
House of Ainu tribe, Northen Japan
Inside of the house of Ainu