Tokyo Outside Festival × Outdoor Festival 2020 is a weekend event celebrating the great outdoors at Tachikawa's Showa Kinen Park. There will be opportunities to take part in craft activities and sporting events, appreciate flowers and greenery, connect with various exhibitors at their outdoor and fishing booths, and more.
If you work up an appetite while you're there, you'll find numerous food vendors on site, selling everything from pizza and burgers to coffee and crepes.
Admission to the event itself is free, but bring some yen as certain activities come with a fee.