**Acknowledgements**

In the operation of the walking support system and the Web questionnaires survey of the present study, enormous cooperation was received from those mainly in Chofu City and the neighboring areas in Tokyo Metropolis, Japan. We would like to take this opportunity to gratefully acknowledge them.

#### **Conflict of interest-**

The authors declare that there is no conflict of interest that could be perceived as prejudicing the impartiality of the research reported.
