Thanks Mari. Good suggestions! I'd very much like to meet some locals and will try to do that. I'm staying in Kabukicho-Shinjuku so there will be lots of things to do around there!
Maybe some experiential activities such as calligraphy, sushi making, or udon cooking? You can find plans here:
Hub Japan also offers a plan to meet with local Japanese. You can have dinner together with local Japanese and get to know about how locals live in Japan: