In the shower one day, long-term Tokyo resident Neil Grainger noticed that the birthmark on his back had changed color. Concerned, he went to the local clinic, but the doctor assured him it was nothing to worry about.

Three or four months later, the mole began to bleed. “I could only wear dark-colored shirts in case it bled during the day,” he says. “If I banged into something, I would get blood on my shirt.”

Unable to view this article?

This could be due to a conflict with your ad-blocking or security software.

Please add japantimes.co.jp and piano.io to your list of allowed sites.

If this does not resolve the issue or you are unable to add the domains to your allowlist, please see out this support page.

We humbly apologize for the inconvenience.

In a time of both misinformation and too much information, quality journalism is more crucial than ever.
By subscribing, you can help us get the story right.