I see apps pay to license data from https://www.cjk.org https://www.cjk.org for pitch accent data. I don't know what their data looks like though. Maybe you're

I see apps pay to license data from https://www.cjk.org https://www.cjk.org for pitch accent data. I don't know what their data looks like though. Maybe you're right and their business case for this data is essentially a scam, or there is non-factual copyrightable data, or the law is different in Japan, I don't know.