I read such news with a grain of salt:

However, when officials went to congratulate him on his 111th birthday, they found his 30-year-old remains, raising concerns that the welfare system is being exploited by dishonest relatives.

https://www.bbc.com/news/world-asia-pacific-11258071 (2010)

> More than 230,000 elderly people in Japan who are listed as being aged 100 or over are unaccounted for, officials said following a nationwide inquiry.

That's a pretty stark difference.