Realistically speaking, in asian standards, especially JP, she is a little bit overweight, like SLIGHTLY chubby.
If we're comparing it to America or a country with high BMI then yeah, she is "normal" weight.
It just depends on the country and where you live, perspective changes a lot.
If you compare her body to Mikeneko (Rushia), Rika (Yozora Mel), Guutara (Yuzuki Choco), you're going to see a huge difference.
Also, Not sure if it is a hot take or not, but most of the girls in JP porn are kind of low quality / ugly.