The conviction was about a year after the crimes, which is a lot faster than I would expect than in my country. 5.5 years does seem light to me, too.

The rhetoric is still somewhat apologetic to the perpetrators. Like "it's difficult for students to resist due to a sense of closeness to their teachers" doesn't say anything about rank, authority, and power that teachers have over students. And "checking whether a teacher is under excessive pressure" seems to redirect fault away from the perpetrator.