At around 8:30 you can see that she a SAK style pocket knife dangling from the zipper pull.
I see it. Since the lady did not cover it, we don't know what features it has. There may be SAK-like tools that are legal in Japan.
I don't know what the law in Japan says. In a different country, Isreal, carrying a fixed-blade knife or a folder with a locking blade is not legal. However, a folder with a non-locking blade is legal.
Jeanette Isabelle