Chihiro Art Museum Tokyo

Built on the spot where beloved painter and illustrator Chihiro Iwasaki used to live, this museum is hidden away in residential Shakujii and boasts one of the world's largest collection of picture books and illustrations for children. In addition to exhibiting Iwasaki's work, it regularly puts on themed shows and houses a café where you can sit down to admire the colourful tomes over a drink. Families with small children make up the bulk of visitors, but you might also spot architecture geeks who come to inspect the Hiroshi Naito-designed building.