I am not too certain. But here are some examples (NSFW).
https://www.adl.org/resources/hate-symbols/search
Looks like they involve discrimination (on race or religion or such). But Japan's new law is more general.
https://www.adl.org/resources/hate-symbols/search
Looks like they involve discrimination (on race or religion or such). But Japan's new law is more general.
But I don't have a legal definition, while I do have that link.
In other words, unless the person you're replying to is a lawmaker with supreme authority, there is no need for them to speak for what you might have 'hate speech' defined as in law. Most people aren't lawmakers, but they are involved in the process of creating laws.