It is called konbu-cha[1] or kobu-cha[2] (昆布茶, meaning "Kombu-tea") in Japan, haidai-cha (海带茶) in China and dasima-cha (다시마차) in Korea.

[2] Fuku-cha(福茶, meaning "fortune tea") is sencha green tea with kelp, umeboshi, kuromame (black beans), and sanshō and is drunk on the last day of the year (Ōmisoka), in New Year, and on the day before the beginning of spring (Setsubun) in Kansai region,[3] wishing a long life.

[3] In particular, in New Year, oo-buku-cha or dai-buku-cha (大福茶, meaning "very good fortune tea"), which is sencha green tea with kelp and umeboshi,[4] is drunk in Kansai region[4] wishing good health and happiness.

It is made by drying kelp to a fine powder and blending it with seasonings such as salt and sugar[2].

[2][9] It is said that, in 951, Kūya made a statue of the Ekādaśamukha to cure an epidemic that was spreading in the capital and went around the city giving oo-buku-cha to the sick.