Six ways Japanese women can deter gropers on trains and sexual harassment, from stickers to stamps
- Sexual assault is so common on Japanese public transport that IT firms and even stationers offer solutions
- Audible phone camera clicks, stamps, stickers and apps are among the innovations

A stationery maker has joined the war against groping on Japanese public transport with a stamp that marks perpetrators with a special ink.
Invisible to the naked eye, a temporary hand-shaped design appears when a UV light is shone on the area. Nagoya-based company Shachihata said its new product could be used to identify culprits, though it was not immediately clear how long the ink would last.

A limited supply of 500 of the 9mm-wide “anti-nuisance” stamps, priced at around US$25 (HK$200), sold out within an hour of launch on August 27.
Company spokesman Hirofumi Mukai said the product was designed primarily as a deterrent to gropers – the stamp comes with a strap that can be attached to a bag to signify the wearer is carrying the device, according to the Japan Times.
The company began developing the stamp in response to a viral tweet in May in which a woman suggested using a safety pin to spike gropers’ wandering hands. “We will continue to consider ways for us to contribute to society,” the company tweeted.
