TOKYO — Japan’s longest-serving Prime Minister Shinzo Abe said on Friday he will be stepping down because a chronic health problem has resurfaced. He told reporters that it was “gut wrenching” to leave so many of his goals unfinished. The prime minister said his health started to decline as his ulcerative colitis resurfaced around the middle of July. He was now receiving a new treatment for the condition which had to be administered on a regular basis and would not give him enough time to carry out his prime ministerial functions, he added. He said he could not make any mistakes in terms of important decision making, and therefore had decided to step down. "I made a judgment I should not continue my job as a prime minister," he said, reported BBC. "I would like to sincerely apologize to the people of Japan for leaving my post with one year left in my term of office, and amid the coronavirus woes, while various policies are still in the process of being implemented," he added, making a bow. Abe has had ulcerative colitis since he was a teenager and has said the condition was controlled with treatment. Concerns about Abe’s health began this summer and grew this month when he visited a Tokyo hospital two weeks in a row for unspecified health checkups. He is now on a new treatment that requires IV injections, he said. While there is some improvement, there is no guarantee that it will cure his condition and so he decided to step down after treatment Monday, he said, reported the Toronto Star. “It is gut wrenching to have to leave my job before accomplishing my goals,” Abe said Friday, mentioning his failure to resolve the issue of Japanese abducted years ago by North Korea and a territorial dispute with Russia. In a country once known for its short-tenured prime ministers, the departure marks the end of an unusual era of stability that saw the Japanese leader strike up strong ties with US President Donald Trump even as Abe’s ultra-nationalism riled the Koreas and China. While he pulled Japan out of recession, the economy has been battered anew by the coronavirus pandemic, and Abe has failed to achieve his cherished goal of formally rewriting the US-drafted pacifist constitution because of poor public support. Abe is a political blue blood who was groomed to follow in the footsteps of his grandfather, former prime minister Nobusuke Kishi. His political rhetoric often focused on making Japan a “normal” and “beautiful” nation with a stronger military and bigger role in international affairs, wrote the Toronto Star. Abe, whose term ends in September 2021, is expected to stay on until a new party leader is elected and formally approved by the Parliament. Abe on Monday became Japan’s longest serving prime minister by consecutive days in office, eclipsing the record of Eisaku Sato, his great-uncle, who served 2,798 days from 1964 to 1972. — Agencies