Media playback is unsupported on your device

Subway superhero helps citizens of Tokyo

22 August 2013 Last updated at 20:56 BST

Tokyo's metro system is the busiest in the world, and notoriously difficult to navigate.

If you have heavy luggage or a pushchair, the lack of escalators or elevators makes matters even worse.

This is complicated by the fact that Japanese culture makes it difficult to accept a favour from a stranger.

Now one resident is taking matters into his own hands, with the help of a $40 superhero costume.

Jonathan Josephs reports.

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.