You'll find it north of the ticket gates (opposite the shopping center).
Since Okubo Station is an over-track station, there's an escalator leading down to the ground when you head north. When you get off the escalator, you'll find benches right in front of you. It's indoors, so you should be comfortable there.
There's one long wooden bench and one shorter wooden bench side by side.
If people sit close together, it looks like it could seat about 15 people, but let's keep some space between us to prevent the spread of COVID-19.

You'll find it north of the ticket gates (opposite the shopping center).
Since Okubo Station is an over-track station, there's an escalator leading down to the ground when you head north. When you get off the escalator, you'll find benches right in front of you. It's indoors, so you should be comfortable there.
There's one long wooden bench and one shorter wooden bench side by side.
If people sit close together, it looks like it could seat about 15 people, but let's keep some space between us to prevent the spread of COVID-19.