is a Japanese manga series written and illustrated by Tomoko Ninomiya. It began serialization in Kodansha's manga magazine Kiss in November 2013.
Plot The once prestigious Kitakami family fell apart for unknown reasons. Akisada Kitakami, the eldest son of the family, was pawned by his grandmother at Kurata-ya, an old pawnshop that existed since the Edo period. The owner of Kurata-ya and Akisada's grandmother made a pact: if Akisada wasn't redeemed within three years, he would have to be engaged to his granddaughter. Years later, Akisada, who hadn't been redeemed and had grown up at Kurata-ya, became a door-to-door service worker at a high-end gem shop and became engaged to Shinobu Kurata, the granddaughter of the former owner. Shinobu possesses a talent for identifying genuine gemstones and a magical ability to discern the "aura" of gemstones. The story revolves around gemstones and pawnshops, unfolding as Akisada searches for the Kitakami family's ruby from his memories.
Media Manga Written and illustrated by Tomoko Ninomiya, Nanatsu-ya: Shinobu and Her Jewelry Box began serialization in Kodansha's manga magazine Kiss on November 25, 2013. Its chapters have been compiled into twenty-seven volumes as of June 2026.
The series chapters are published in English on Kodansha's K Manga app.
Other In November 2021, in commemoration of the 30th anniversary of Kiss magazine, the series, alongside seven other series, collaborated with the boy band Be:First. In 2022, the series was featured in an exhibit about jewels at the National Museum of Nature and Science in Tokyo. In June 2025, in commemoration of the series' 100th chapter, the series had an illustration collaboration with Nodame Cantabile.
Reception The series was ranked 40th in Da Vinci magazine's "Book of the Year" ranking in 2020.
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