Formal "Coming of Age" ceremonies, which began as a rite of ancient samurai families, were held across Japan for its 20-year-olds, reminding them of their responsibilities after becoming old enough to legally drink and smoke.
Their male counterparts looked more like they were attending job interviews as most opted for the kind of plain business suit they will wear as "salarymen" in the future.
"I'll definitely be having a few drinks tonight," Arisu Oshida told AFP, wrapped in a salmon-pink kimono and expensively made-up with cherry-red lips and gold flakes in her hair.
Huddled against the chill wind, crowds of new adults offered prayers at Tokyo's Meiji shrine, while many more flocked to Disneyland just outside the capital to ride rollercoasters and pose for photos with Mickey Mouse and friends.
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Celebrated on the second Monday of the year from snow- swept northern Japan to the subtropical south, Coming of Age Day includes those who turned 20 the previous year or will do so before March 31.
There were an estimated 1.23 million new adults as of January 1 -- largely unchanged from the previous year and half the 1970 peak of 2.46 million, according to government figures -- mirroring Japan's shrinking population.
"I suppose I have to be more responsible now I'm officially an adult. But I'm not confident that I won't be very drunk later tonight.