Operation Japan Prayer Guide
https://rjcnetwork.org/operation-japan-prayer-guide/
https://rjcnetwork.org/
Operation Japan Prayer Guide leads you to pray for Japan in one year,
praying from Hokkaido to Okinawa, along with various other ministries.
Operation Japan: Japan in Focus--A Handbook for Prayer
Amazon
https://www.amazon.com/Operation-Japan-Focus-Handbook-Prayer/dp/4990057627
This book was published in 1997.
OMF - Japan Prayer Resources
https://omf.org/resources-for-mission/the-task-unfinished/japan-prayer-resources/
https://omf.org
Operation World - Japan