From toy-train sushi to character-spotting in Tokyo, Jade Conroy discovered one of the easiest places in Asia to visit with children Get Travel Insider with Simon Calder. A newsletter packed with tips, deals, inspiration, and the latest travel news Get the Travel Insider newsletter with Simon Calder Get the Travel Insider newsletter with Simon Calder Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy notice W hen my four-year-old