 Students of Koide included Fukuda Riken, who is also known as Fukuda Sen.The first extensive logarithmic table was published in 1844 by Koide Shuki.This was twenty years after the death of Sakabe Kōhan, whose "Sampo Tenzan Shinan-roku" ("Treatise on Tenzan Algebra") in 1810 proposed the use of logarithmic tables.