Turnip Seeds - Tennouji Kabura. Heirloom, Non-GMO. Brassica rapa subsp. rapa. 25-45 days depending on type of maturity. Cool season annual. The Tennouji Kabura is one of the oldest traditional Japanese turnips. It was originally a specialty of the Osaka Tennouji district, where it thrived during the Edo era in the 17th, 18th and 19th centuries. The Tennouji is a close relative to variety #116 Nozawana, when its seed was sown in 1756 in the mountainous region of Nozawa. ~ 9,000 seeds / oz.