The sovereign's message of 607 brought to Emperor Yang by an envoy sent from Wa to Sui to learn Buddhism included this famous phrase, "From the sovereign of the land of the rising sun to the sovereign of the land of the setting sun. I hope you are doing well," which made Emperor Yang, who had already become a Dharani by Bodhisattva Precepts in 591, angry.
大業3年（607年）の国書に「'聞海西菩薩天子重興佛法故遣朝拜兼沙門數十人來學佛法其國書曰日出處天子致書日沒處天子無恙云云」とあり、仏教を学ぶための使者の国書が有名な「日出處天子致書日沒處天子無恙云云」であり、開皇11年（591年）菩薩戒により総持菩薩となった煬帝を怒らせた（「」）