Anju Kouzuki 香月杏珠

Hard to believe she is of legal age now. Hope she keeps going.
Well there's a bit more to that you see; When you do a websearch for the age of consent in Japan and you are most likely to find 13 as the age of consent. However, the age of consent in Japan is 13 years old under the Japanese national criminal law code. but note that all municipalities and prefectures have their own particular laws such as Tokyo's "Youth Protection Law" which prohibit adults from having sex with youths who are under 17 years old. So it depends on what prefecture you are in and most of the time it varies between 17 and 18.
So even though Anjyu is now 16 that doesn't mean that she is "legal age" for the things you might be implying…
I do however agree with your statement to see her continue modeling in the industry.
杏珠 ぺろ.jpeg
ぺろ〜
 
The U-18 genera seems to be fairly thin... Maybe they prefer that the models concentrate on their education for that time or something, and then decide if they want to carry on at 18. And of course they often change name.