Japan and Russia have agreed to strengthen economic cooperation.

In order to succeed in this project, it is necessary to strengthen teamwork.

We hold meetings every week to strengthen teamwork.

Exchanges between both countries are becoming more active.

There is a wonderful sumo arena in Ryogoku.

We reached an agreement on that issue.

We agreed to the plan.

We need to cooperate to make this project successful.

We have to cooperate to make the project successful.

He is an expert in economics.