'STRIKE' magazine has released a digital PB of Yuukarin: https://prtimes.jp/main/html/rd/p/000000994.000007785.html
Japanese G cup is a US triple D, btw. Japan doesn't have an AA size, which is the smallest size in UK, US and EU - an AA in those countries is equivalent to an A in Japan. Japan generally skips all double letters (UK has DD, FF and GG, US also has DDD), so a Japanese G is like three sizes smaller than a UK G.
In today's video she's having food with a family who she appears to be related to and with whom she's speaking Chinese: if the video does not show watch the video here In her page on Chinese Wikipedia it says that her mother is from northern China and she lived in China before kindergarten - she can speak Chinese but not read or write it.
Bikini cover dance in the snow of 'Kawaikute Gomen' by HoneyWorks ft. Capi: if the video does not show watch the video here
While bathing in an open-air onsen, Yuukarin talks about the ban on idols dating: if the video does not show watch the video here