TOKYO (Reuters) - Japan is set to break with its age-old tradition of requiring citizens to use personal seals to stamp all official documents, scrapping their use in nearly 15,000 administrative processes, an official at the Cabinet Office said on Friday. The use of seals will be abolished for all but 83 instances such as automobile registration, the official said, affecting transactions carried out by millions of Japanese every day. The official said no specific timetable has been set for phasing out seal use. The radical switch comes as newly installed Prime Minister Yoshihide Suga seeks to boost use of digital technology to streamline processes and spur lacklustre growth in the world’s third-biggest economy. A custom originally imported from China more than a thousand years ago, the use of seals - ‘hanko’ in Japanese - was formalised by Japan’s government in the mid-1800s