UUUM (company)
As of April 2020, there are over 10,000 YouTube channels belonging to UUUM, the most famous including HIKAKIN, Hajime Syacho, Tokai On Air, Fischer's, Yuka Kinoshita, and Mizutamari Bond. Overview. UUUM, co-founded by YouTuber HIKAKIN and Kazuki Kamada in 2013, manages Japanese YouTubers by handling the day-to-day business side of YouTube, such as dealing with brand partnerships. The influencers belonging to UUUM work with many Japanese brands and receive income from creating content around their products. HIKAKIN and Kamada decided to start managing YouTubers having seen the various problems that YouTubers were facing, such  as not knowing how to proceed with business negotiations with companies, and not being able to make a contract with an agency without being a juridical person. In 2014, interest towards YouTube celebrities increased, and UUUM grew alongside this trend. As a result, when the number of the company's clientele was 40 influencers at the beginning of 2014, at the end of the year the number had increased to 2,500. History. In June 2013, Kazuki Kamada established ON SALE Co., Ltd. for the purpose of online sales business using YouTubers' videos, after meeting HIKAKIN. The company name was to  be changed, and while thinking "うーむ, Ūm" (Japanese equivalent of "Hmm") about a good company name, "Ūm" was chosen as the new company name. Although they wanted a company name that could take the domain ".com", as one U was not possible, the domain was finally set up with three U's, and thus the company became known as "UUUM".