100+ heirloom non-GMO Sakurajima Mammoth Daikon seeds 鹿児島县櫻島さくらじま大根; giant white radish. Guinness world record is 31.1KG (68lb 9oz) from Kagoshima Sakurajima daikon contest held in 2003.

Do google to find growing tips, as our traditional radish growing method may only produce 5-10 lb size daikon.

Late summer planting has higher chance of good harvest than early spring, unless you have pleasant summer weather with lesser bolting.

need more seeds?
Large 1/4-OZ packet has ~350 seeds
Jumbo 1/OZ packet has ~1,400 seeds

世界一の重さをもつ大根としてギネスにも認定されています。また、血管機能の改善効果が期待できる「トリゴネリン」を含んでおり、健康野菜として注目されています。

Good Reading (in Japanese): https://ja.wikipedia.org/wiki/%E6%A1%9C%E5%B3%B6%E5%A4%A7%E6%A0%B9

Recipes (in Japanese): https://www.city.kagoshima.lg.jp/seisanryutu/sangyo/norin/recipe/daikon/index.html