When you land on kameda-lab.org, you're looking at a personal research page that's been online since before most websites existed. The owner, Yoshinari Kameda, is a real faculty member at the University of Tsukuba, and the site has a 25-year archive history with zero blacklist flags or security warnings from Google. That kind of longevity and clean record is a strong sign of a legitimate, non-commercial project.
For an academic lab page, you wouldn't expect a privacy policy or social media presence — those are normal absences. The bigger concern is the lack of HTTPS. Any data you type into a form or send through the site is sent in plain text. That's fine for reading a paper or browsing links, but don't upload files, log in, or share personal information. If you're doing research and need a PDF from the site, you're safe. Just keep in mind that many modern browsers will flag the connection as 'Not Secure'. It's not a sign that the site is a scam — it's a sign it hasn't been updated with encryption, which is common for older academic pages. Overall, kameda-lab.org is what it looks like: a professor's web archive, not a commercial operation. Use it for content, not transactions.