Amanatto
amanattō, 甘納豆
Amanattō is a Japanese traditional confectionery made of azuki or other beans, covered with refined sugar after simmering with sugar syrup and drying. It was developed by Hosoda Yasubei during the Bunkyū years (1861–1863) in the Edo period. He opened a wagashi store in Tokyo, which he named for his childhood name: Eitaro. This store continues to operate. Amanattō was originally called amananattō (甘名納糖); the name was abbreviated to amanattō after World War II. The resemblance of the name to the fermented bean dish nattō is coincidental.[citation needed] In Hokkaidō, amanattō is used in cooking sekihan. For this reason, unlike other areas in East Asia, the sekihan of Hokkaidō is a little sweet.[citation needed]
Source: Wikipedia
Recipes

Amanatto (Candied Beans) - RecipeGullet - eGullet Forums
Amanatto (Candied Beans)Best if started from dried beans that you cook yourself to control the consistency of the beans. You want them cooked but not mushy, picking out any floaty skins, beans without skins and cracked beans. Canned beans are usually...

Amanatto: Sweet Boiled Bean Wagashi Confection - Recommendation of Unique Japanese Products and Culture
One of the best-known Japanese delicacies, “natto (納豆)” is a fermented soybean with a slimy consistency and unpleasant smell to it. Because of that, many people don’t like or can’t eat it, even if they were.....