This treaty was concluded to strengthen the friendly relations between the two countries.

We have entered into a contract with a new business partner.

We entered into a contract with a new business partner.

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 have built a long-standing friendship.

Yuko is my best friend, he always helps me.

Mr. Shinjo is my best friend.