Kaori Honda recalls how she was shocked around two years ago when a railway official rejected her request for help with her daughter's wheelchair as they were about to ride the train.

"Ramps can't be used for baby buggies," the official said.

Since then, Honda, a 36-year-old resident of the city of Osaka and mother of a 5-year-old girl with a cranial nerve disease, has been devoting her time to raising awareness of the buggy-like wheelchairs designed for children with disabilities.