September 6
Tokyo - Long confined to the mountains, Japanese leeches are invading residential areas, causing swelling, itching and general discomfort with their blood-thirsty ways.
Yamabiru, or land leeches, have become a problem in 29 of Japan's 47 prefectures.
The little suckers are riding into towns and villages, hitching lifts on deer and boar whose numbers have grown due to re-forestation and dwindling rural populations.
Once there, the leeches, which measure about 1,5cm before a meal, take to feasting on warm human flesh.
"Yamabiru will climb into people's socks and stay for about an hour, growing five to 10 times in size. Unlike with water leeches, people don't immediately realise they've been bitten. Only later when they see their bloodsoaked feet, do they realise what has happened.
The real problem is that the bleeding won't stop and the affected area swells up and really itches.
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