Nah, Ryoga was clearly a "Nathan."
But seriously, Hamada isn't the only coach or a national coach for Japanese juniors, although she does appear to be influential within the Japanese federation. I just noticed that Nozomu Yoshioka (whom we will see skating soon in the Czech JGP) lists Sayaka Yodo, Utako Nagamitsu, and Keiji Tanaka as his coaches. I selfishly hope to see Keiji behind the boards, although I know he's just an assistant coach at this point.

(I will have to admit,
I heard someone on Twitter saying something to the effect that Hamada is like a Japanese Eteri. Should I give any credence to a statement like that? Or is that just Twitter people overdramatizing everything as usual?)
This is just my opinion, not trying to change anyone's mind on the matter
I totally get why people equate Hamada and Eteri's approach to coaching however, going by rumors and from what can be confirmed I personally feel like the comparison is a bit extreme
Is Hamada excessively strict with her students, even straight up mean?
Yes
Has she ever treated a student with disregard to their feelings and in an unprofressional manner?
Definitely! Seen it on stream
Does she train and expect too much out of her young talent possibly limiting their future in the sport due to a career ending injury?
Sure
And I believe all the accounts of abuse and mistreatment that Nobu accuses Hamada of to have actually occurred
All that being said, she has never been accused of directly depriving her skaters of food or water or other nefarious doings that could compromise their physical health to the point of hospitalization, nor harm their reputation in a way that could sideline their competitive careers
I'm not condoning or defending Hamada's actions
Abuse (physical, mental or emotional) is ultimately detrimental to the confidence and development of a young athlete
However, I just don't see what Hamada is accused of on the same level as Eteri
There was a Japanese article I saw awhile ago that mentioned a harsh, old school approach to coaching known as "spartan coaching"
I feel this may have been the way Hamada was raised, therefore the style she employs herself
One last thing I want to say on this issue~
Not going to mention names but I've seen first hand (again on stream) another Japanese coach of elite skaters brutally berate a Junior in the KnC after a rough performance (IIRC, at Regionals)
Rather than "seen" I should say "heard" as this coach never entered the KnC area to avoid the camera
I can't confirm everything that was said but the skater just stood there being scolded and humiliated until the score was announced and the camera switched to the next competitor
Japanese fans on twitter were pleading and saying things like "but sensei, they qualified for the next competition"
There are also rumors that a promising young skater had to leave this coach after suffering ill health due to stress
I'm not against condeming Hamada for mistreating her students
But other Japanese coaches will have to be scrutinized as well since many may be guilty of utilizing the same form of severe discipline