Lots of downtime
You climb for a minute and rest for a few. The resting is where conversations happen.
Bouldering, climbing short walls without ropes, has exploded in Tokyo, and it might be the easiest sport for meeting people. Everyone rests between attempts, everyone watches the same wall, and strangers cheer each other on. You don't need experience, a partner or much Japanese.
You climb for a minute and rest for a few. The resting is where conversations happen.
Everyone tries the same routes, so "how did you do that?" is a natural opener.
Unlike rope climbing, you can go alone and still feel part of the room.
Go at the same time each week and you'll start seeing the same faces.
Buy Me a Matcha helps you meet new people in Tokyo one at a time over a coffee or matcha. In English, friends only, free on iPhone.

Yes. The rest breaks between climbs, shared routes and regular crowds make it one of the most social activities in the city.
No. Gyms rent shoes, explain the safety rules and have beginner routes. Basic gestures and a smile go a long way.
Well-known chains include B-PUMP, T-WALL and Base Camp, plus many independent gyms across the city.
Buy Me a Matcha helps you meet new people in Tokyo one at a time over a coffee or matcha, in English. Plenty of people start with a coffee and plan activities together after.