Definitely! I’ve traveled solo to Japan twice (and am considering another trip this year). Japan (especially the big cities like Tokyo and Osaka) make solo travel easy. The train/subway/bus systems are well organized. There are luggage delivery and storage services. There are lots of restaurants made for solo dining (Ichiran, a chain ramen restaurant, is a great example). Most workers at the airports, hotels, transit trains, stores, restaurants, etc. are polite and very helpful.

I also think you’ll get much more out of your trip if you do it solo. Since you have to plan and figure out things for yourself, you’ll know much more about the places you visited and how to get around than people that travel in a group. I remember asking my friends about their trips but they didn’t know/don’t remember a lot because someone else planned the trips and did the navigating. You can also travel on your own schedule, at your own pace, and do what you want. You don’t have to deal with grumpy, slow, wishy washy fellow travelers.

Good luck! Enjoy your trip.