TETSUJIN Holdings, Inc. engages in karaoke room management, media and content, food and beverage, beauty services, and real estate operations primarily in Japan. The company offers karaoke distribution systems and operates karaoke shops under the flagship brand Karaoke no Tetsujin in major urban areas such as Tokyo; mobile content including ringtones, ring melodies, lyrics, and deco-mail; an Android dictionary and curation site featuring articles for Android users; content collaboration and in-store media products; restaurants; beauty salons providing nail care, eyelash extensions, eyebrow treatments, and head spa services; and real estate facility management. TETSUJIN Holdings, Inc., founded in 1999 and headquartered in Tokyo, Japan, operates through segments including Karaoke Room Management, Food and Beverage, Beauty, and Media and Content Planning, targeting urban consumers in the consumer cyclical sector with approximately 384 employees. The company, formerly known as TETSUJIN Inc., changed its name to TETSUJIN Holdings, Inc. in February 2024 to reflect its expanded holding structure. In 2025, GENDA Inc. acquired fixed assets of select Karaoke no Tetsujin stores from the company, including locations in Takadanobaba, Ueno, Iidabashi Kagurazaka, and Shinjuku Kabukicho, marking a strategic asset divestiture.