Sylvia, do you know anything about the Japanese girls at this competition?
I'm not Sylvia, but I know about Mari and Kanako.
I don't think Mari will be contending for a medal - she was 10th at Junior Nationals last year and her personal best score isn't very high. She achieved the amazing feat of having both her lutz and flip score deducted because of a wrong edge take-off in the LP. She seems to have all the triples, but flutz/lip, lack of consistency and lack of combos kept her score low.
Kanako is a very promising skater. She is coached by Machiko Yamada (former coach of Midori Ito and Mao Asada). She used to have all the jumps and even landed an (underrotated, but still) 3A. Recently, however, she had a huge growth spurt. It affected her harder triples - she has problems to rotate them fully. She also had an arm injury last spring.
A montage created before the growth spurt hit:
http://www.youtube.com/watch?v=6c-VP1Uc6Pg
Her LP, "Tango de los Exilados" skated in March 2008 (after she started growing):
http://www.youtube.com/watch?v=zMIZ7GVA2jw
(LP starts at 2:22)
A very recent exhibition (The Ice 2008):
http://www.youtube.com/watch?v=kOGx23oqAa4
(It looks like she's got a lot of the speed, power and confidence back, but the timing on the jumps is still off.)
She has great musicality and expression for her age, her spins are very nice as well. I'd say she's the one to look out for in the future, but right now underrotations and/or popped jumps might keep her score low.
The Japanese media love her already and there were a few programs about her and her training mate, Sayaka Matsubara. Kanako's favourite skater is Mao Asada, while Sayaka's - YuNa Kim, so the media treat their rivarly as sort of a next coming of Mao/YuNa rivalry.