Einin Era

Einin (1293-1299) was a late-Kamakura-period era name, proclaimed on the 5th day of the 8th month of Shōō 6 (September 6, 1293) in response to unusual celestial events and an earthquake in the Kantō region, and it lasted until the 25th day of the 4th month of Einin 7 (May 25, 1299), when the era was renamed Shōan. The reigning emperors were Fushimi and Go-Fushimi, and the Kamakura shogunate's regent (shikken) was Hōjō Sadatoki. The era's defining event was the Einin Tokusei Decree of Einin 5 (1297). Gokenin vassals, who had shouldered heavy defense burdens during the Mongol invasions (the Bun'ei and Kōan campaigns) without receiving adequate rewards, fell increasingly into debt as a money economy took hold; many were forced to pawn or sell their landholdings to moneylenders (karishiage). The decree banned the further pawning and sale of gokenin land and ordered the free return of already-lost holdings, marking a pivotal moment of strain in the relationship between the shogunate and the warrior class. In sword history, the celebrated Yamashiro Rai-school smith Rai Kunitoshi remained vigorously active through this period; a signed tachi dated "Rai Kunitoshi / Einin 5, 3rd month, 1st day" (named Hotarumaru, an Important Cultural Property) is recorded, though it has been missing since the end of the Second World War. Dated inscriptions on his surviving blades show Kunitoshi working continuously from Shōō through Genkō (1288-1324), placing the Einin years squarely within his prime. In Bizen province, Osafune Nagamitsu, the second head of the Osafune school, left a tachi dated Shōō 2 (1289), indicating that he too remained a central figure of his school into and around the Einin years. The era is thus marked by a striking contrast: gokenin vassals sinking into financial hardship despite insufficient reward for their wartime service, set against sword production in Yamashiro and Bizen that continued at a consistently high level.