Kane Tanaka, who has not been able to see her family due to the pandemic, celebrated with a bottle of Coke

A 117-year-old woman with a weakness for fizzy drinks and chocolate has become Japan’s oldest person on record, as the country marks a public holiday devoted to its senior citizens.

Kane Tanaka, who had already been recognised by the Guinness Book of Records as the world’s oldest living person in March last year, achieved the all-time Japanese age record on Saturday, when she became 117 years and 261 days old.

Related: Making a slow getaway: Japan's anti-yakuza laws result in cohort of ageing gangsters