There are many ways to find information after deciding the topic of the thesis, combining my original graduation thesis to find information:

1, library. The library in our school is generally good. Let's go to the library to find books for the paper.

2. Network. Look for papers related materials, or papers written by predecessors, and choose your own useful materials. The network here includes discussion libraries, domestic web pages and Japanese web pages.

3. Newspapers and magazines related to Japan. This is more difficult, and generally no one has the patience to find it.

4. Ask the teacher for help, hoping that the teacher can help provide some information.

I think the information found in 1 and 2 fully meets the needs of a paper. If it is not enough, ask the teacher for help.

I hope it helps you.