Oliver Arlow: Behind bright lights can lurk the darkest secrets
The mistake that many people make when they first arrive in Tokyo is that they are completely safe. The neon of Shibuya is beguiling, the shops of the Ginza tempting and restaurants, bars and clubs throughout the city are accessible and welcoming.
This is true even of foreign visitors who do not know the language, culture or customs.
Although only visitors to Tokyo, Nicola Furlong and her friend would have had the same experience walking around the city as any western women.