Jōjin was Japanese Tendai

Tendai

is a Japanese school of Mahayana Buddhism, a descendant of the Chinese Tiantai or Lotus Sutra school.Chappell frames the relevance of Tendai for a universal Buddhism:- History :...

 monk who documented his journey to Chinese buddhist centres of Tiantaishan and Wutaishan in 1072–1073 in San Tendai Godai san ki (參天台五臺山記).

Jōjin’s home monastery was Enryaku-ji

Enryaku-ji

thumb|300px|Konpon Chū-dō , Enryaku-ji's main hall is a Tendai monastery located on Mount Hiei in Ōtsu, overlooking Kyoto. It was founded during the early Heian period. The temple complex was established by Saichō , also known as Dengyō Daishi, who introduced the Tendai sect of Mahayana Buddhism...

 (延曆寺) on Mount Hiei

Mount Hiei

is a mountain to the northeast of Kyoto, lying on the border between the Kyoto and Shiga prefectures, Japan.The temple of Enryaku-ji, the first outpost of the Japanese Tiantai sect of Buddhism, was founded atop Mount Hiei by Saichō in 788. Both Nichiren and Honen studied at the temple before...

. He sent a cache of printed texts back to Japan in 1073 covering translations made since Chōnen’s (涯然) mission in 984.

Literature related to Jōjin figures prominently in Nihonjinron

Nihonjinron

The term literally means theories/discussions about the Japanese. The term refers to a genre of texts that focuses on issues of Japanese national and cultural identity. The literature is vast, ranging over such varied fields as sociology, psychology, history, linguistics, philosophy, and even...

 - a genre of texts that focuses on issues of Japanese national and cultural identity. They appear in two early anthologies, the more famous being the Shin Kokin Wakashū (新古今集), the eighth imperially sponsored collection of poetry in Japanese, compiled circa 1205, where, it is preceded by the headnote, "Composed by his mother when the monk Jōjin went to China."

The poem attracted little attention until 1942, when the newspapers that evolved into the present Mainichi Shimbun

Mainichi Shimbun

The is one of the major newspapers in Japan, published by .-History:The history of the Mainichi Shimbun begins with founding of two papers during the Meiji period. The Tokyo Nichi Nichi Shimbun was founded first, in 1872. The Mainichi claims that it is the oldest existing Japanese daily newspaper...

 published "Aikoku Hyakunin Isshu" 愛国百人一首, literally something like, "One Hundred Patriotic Poems by One Hundred Poets." The title refers to the familiar Hyakunin Isshu

Hyakunin Isshu

is a traditional anthology style of compiling Japanese waka poetry where each contributor writes one poem for the anthology. Literally, it translates to "one hundred people, one poem [each]"...

, a medieval anthology of one hundred poems, each by a different poet. Because the poems came to be used in a card game played in Japanese homes every New Year, they are among the best known in the classical Japanese poetic canon.