I can apply for a tourist visa myself. Can I get a job in Japan?

You can't. You cannot work in Japan with a Japanese tourist visa. All regular shops, whether private enterprises or group companies, will not hire you. Even if you find someone who is willing to hire you, you are still a black worker. You have to take great risks yourself, and your personal rights and interests are not protected by law. As long as you are found by the Immigration Bureau, you will be sent back to China, and you and your family will never be able to apply for various visas in Japan.