Why would you think this has anything to do with Catholicism?
There are plenty of Japanese cults out there.
The Power of Japan’s Religious Party
December 4, 2014
Japanese Prime Minister Shinzo Abe’s victory in the upcoming December 14 general elections is expected. But the extent of the political foothold of the ruling Liberal Democratic Party (LDP) will be dependent once again on the support of the Soka Gakkai, the massive Buddhism-based organization that dominates Japan’s religious landscape.
https://www.wilsoncenter.org/article/the-power-japans-religious-party