I am under 16 and want to travel to Japan. Can I ask my grandmother or brother (over 18 years old) to accompany me when I apply for a passport? Must parents? Yes, home.

To get you to apply for a passport, you must be accompanied by your guardian, and you can't do without one parent! It must be signed by both parents. You need to apply to the entry-exit administration where your household registration is located. It's not a Japanese passport! It's a China passport. You can only apply for a Japanese visa at the Japanese Consulate after you get it. Minors are not allowed to apply for tourist visas by themselves, and they must be accompanied by guardians.