Should i join a group tour o travel on my own?

Hiii, i know this kind of stuff is personal, but I need advice. I am a 21 y/o girl, and since next year i am graduating i asked my parents for a vacation to japan. I do not really like the idea of travel groups. I don't know why but the idea of having to stick to a fixed schedule irritates me, (not to mention their ridicully high prices). But my parents do not think is safe for a young woman to travel alone, and also they don't trust me enough to make a good itinerary with the help of google and this subreddit (you are really Helping me guys). What should i do?

by erModabanana21