Jesus said to go into all the world to preach the gospel. He has led missionaries to go from Japan to share his message around the world. He also has led about 2,000 missionaries to go to Japan. Pray for God’s blessing on both of these groups.
As for the missionaries who have gone from the USA to Japan especially pray for the Lord’s material provision. The yen is at its highest ever, around 80 yen per dollar. That means that many missionaries are surviving on 25 to 50% of their financial support. And the sending churches struggle to keep up with their giving.