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What is ulcerative colitis, Shinzo Abe’s medical complaint that caused him to resign as Japan’s PM?

  • Abe is understood to have had the complaint from a very young age, though his symptoms have worsened considerably in recent months
  • The condition affects the large intestine and rectum, causing diarrhoea – often with blood or pus – abdominal pain, cramping, rectal pain and bleeding

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Japanese Prime Minister Shinzo Abe announces his resignation on August 28 after seven years and eight months in office. Photo: DPA
Julian Ryall
Japanese Prime Minister Shinzo Abe’s medical complaint, which forced him to resign for a second time on Friday, is a chronic condition that can cause ulcers and long-lasting inflammation in the digestive tract.

Known as ulcerative colitis, it affects the innermost lining of the large intestine and the rectum, with symptoms developing over time rather than a sudden onset.

Abe is understood to have had the complaint from a young age – he has talked about flare-ups when he was in junior high school – though his symptoms have worsened considerably in recent months. Ulcerative colitis typically occurs intermittently, sometimes with years between flare-ups.

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Abe has spoken candidly about his condition, confirming to domestic media that he started taking Asacol, or 5-aminosalicylic acid (5-ASA), in 2009 – two years after he first stepped down as prime minister. The drug was newly approved in Japan but had been available in other countries for some time.

02:19

Japan’s Prime Minister Shinzo Abe resigns for health reasons

Japan’s Prime Minister Shinzo Abe resigns for health reasons

“If this drug, Asacol, had taken more time to appear on the market in Japan, it is quite possible that I would not be where I am today”, Abe said in a speech in 2013, underlining just how debilitating his condition had become.

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“For that very reason, I consider it both my role and my fate to restore and enrich the lives of patients suffering from intractable illnesses.”

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