Can I only find a travel agency to sign a tourist visa to Japan?

Yes, the Japanese Embassy sends visas to all visa types except diplomatic visas through travel agencies or agencies. If we just talk about tourism, it is a travel agency. You can't submit visa application materials directly to the embassy, you must go through a travel agency. Moreover, on the official website of the Japanese Embassy, you can find the names of qualified travel agencies from all over the country, which means that only these travel agencies are qualified to issue visas to the Embassy. Of course, the actual situation is that it is no problem for you to find a travel agency in a treasure, and they also issue visas through the visa center of large travel agencies.