Monday was Coming-of-Age Day, when thousands of new Japanese adults celebrated turning 20 while wearing traditional kimono in commemoration ceremonies.

But it was not only Japanese citizens who observed the personal milestone in the country. In fact, this year more than 1 in every 8 new adults in Tokyo's 23 wards are not Japanese citizens, figures compiled by The Japan Times show.

According to data provided by the 23 ward offices, 10,959 new non-Japanese adults live in central Tokyo, or 13 percent of the 83,764 new adults living in the city.