When Japan’s discerning Udon connoisseurs’which are just about everyone - eat out, they expect, and demand, the “real thing.” For this reason, especially in Kagawa Prefecture the Udon served in restaurants is almost always made on the premises or at a small-scale local factory and delivered fresh each morning. Until recently and unlike many other traditional Japanese dishes, there were no nationwide Udon restaurant chains. When Hideto Maeda, the founder and ex-CEO of Hanamaru, launched his business in 2001, he saw a big opportunity to use modern management and logistics techniques to bring Japan’s most famous Udon variety - Sanuki Udon - from his home area to a much wider audience. As of 31 December 2011,the total number of restaurants in the Hanamaru chain was 309 including directly run and franchise outlets serving over 4 millions customers each month. A major part of this success may be attributed to bring able to offer authentic Sanuki Udon to consumers in Tokyo and other large cities. The restaurant’s popularity is also enhanced by offering a wide choice of dishes and combinations at reasonable price.

Hanamaru, Inc., was founded in November 2001 in Takamatsu, the capital city of Kagawa Prefecture, where Japan's famous home of Sanuki Udon. The company has built and manages a sophisticated franchise system, encompassing store design, location selection, franchisee and staff training, logistics, ingredient production and marketing.

In 2002,Hanamaru opened a flagship restaurant in Tokyo's prestigious Shibuya shopping district.
In June 2006, Hanamaru became an consolidated subsidiary company of Yoshinoya Holdings Co.,Ltd., which holds one of the biggest Japanese restaurant chains called "Yoshinoya"(1,187 restaurants in Japan, 513 in international) specializing in gyudon, or "beef bowl" with it's over 111 year's history in Japan.