Since our founding, we have striven to fulfill our mission of providing "music that is gentle on the mind and body" through sound, music, video, music events, and more.
In recent years, we have been working hard to popularize music therapy by creating sounds based on physiological data, conducting repeated verification, and expanding into preventive medicine, including mental health, as well as the medical field, where it is used for treatment.
In 2019, we developed Japan's first sound supplement, "Sound Supple©," an application that can provide sounds suited to the user's mental state and symptoms.
Through research and development by our medical team and scientific analysis, we have created a groundbreaking and rational system for alleviating, improving, and preventing stress, insomnia, anxiety, mental fatigue, and other issues people suffer from. This system has attracted attention from all walks of life as an ideal solution for the mental health of workers and for the "mental health" of everyone in their daily lives, and we will continue to aim to improve the health-related business through "sound, music, and video."
We at Della believe that we are living in an age where "mental health care" will become increasingly necessary, and we will work wholeheartedly to bring you works and products that are closely related to health and lifestyle, based on the concept of being "kind to the mind and body."
We appreciate your understanding and warm support.
July 2020 CEO of Della Co., Ltd. 
| Trade name | Della Co., Ltd. | ||||
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| location | YK Building 9F, 2-2-16 Sangenjaya, Setagaya-ku, Tokyo 154-0024 | ||||
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| Founding | September 1972 (Showa 47) | ||||
| Establishment | November 1, 1979 (Showa 54) | ||||
| representative | Representative Director Hideo Utsugi | ||||
| capital | 10 million yen | ||||
| Bank | Sumitomo Mitsui Banking Corporation Shinjuku West Exit Branch | ||||
| Affiliated companies | Do-U Limited Company |
| September 1972 (Showa 47) | Della was founded (Yoyogi, Shibuya Ward) Started production and sales of Enka 8TR tapes |
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| 1975 (Showa 50) 1975 (Showa 50) | Composer Hachidai Nakamura joins the board of directors |
| November 1979 (Showa 54) | Della Co., Ltd. is established as a company that plans, produces, and sells cassette tapes, records, CDs, videos, etc. |
| 1980 (Showa 55) 1980 (Showa 55) | Multi-recording studio set up |
| 1982 (Showa 57) 1982 (Showa 57) | Planning and sales of original audio multiplex karaoke sets with Takayuki Akutagawa's narration |
| 1985 (Showa 60) 1985 (Showa 60) | Reprint of "S-ban Hour" released |
| March 1988 (Showa 63) | "Takayuki Akutagawa's Cassette Masterpiece Series" now on sale at bookstores nationwide |
| April 1988 (Showa 63) April 1988 (Showa 63) | Established Doyu Co., Ltd. as a sales company |
| 1989 ( Heisei 1 ) 1989 ( Heisei 1 ) | Compact disc PCD series and PF series are sold at rental stores, record stores, etc. |
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| April 1993April 1993 | Mariko Makino, a certified doctor of the Japanese Society of Psychosomatic Medicine, is appointed as an advisor. Isotonic Sound, a CD for the mind and body, supervised by Mariko Makino, is released. |
| March 1994March 1994 | "Nature Sound Gallery," a series of nature sounds recorded on-site, is released. |
| 1996 (Heisei 8) 1996 8 (Heisei 8) | Released the Music Esthetic Series supervised by Dr. Eiko Umano, Director of Dr. Mano Medical Clinic. |
| 1997 (Heisei 9) 1997 (Heisei 9) | Moved to Sendagaya, Shibuya Ward, and established a new digital recording studio. Developed original fixtures and began introducing them to drugstores, department stores, and specialty stores. |
| 1999 (Heisei 11) 1999 (Heisei 11) | The number of stores using original fixtures reaches 1,500 nationwide. |
| February 2002 (Heisei 14) February 2002 (Heisei 14) | Medical therapy music created based on empirical and clinical data, "Mental Physic Series: The Ultimate Sleep CD" released |
| 2003 (Heisei 15) 2003 (Heisei 15) | The number of retailers nationwide reaches 2,000 |
| May 2004 (Heisei 16) May 2004 (Heisei 16) | Concluded master supply partnership agreement with Taiwan's Jingo Digital Inc. |
| April 2005 (Heisei 17) April 2005 (Heisei 17) | Released "Waves - New Caledonia," a CD with a DVD containing natural sounds and footage shot and recorded on-site. |
| May 2006 (Heisei 18) May 2006 (Heisei 18) | Dr. Haruyoshi Yamamoto, Doctor of Medicine and Director of the Workers' Mental Health Center at Yokohama Rosai Hospital, was appointed as an advisor. Exhibited at Mental Healthcare Japan 2006. |
| January 2007 (Heisei 19) January 2007 (Heisei 19) | Exhibited at the international music industry trade fair, Read MIDEM (Cannes) |
| March 2010March 2010 | Office moved to Roppongi |
| March 2011March 2011 | The Great East Japan Earthquake Reconstruction Support Project "Support from Here" launched CD and donation donations |
| January 2013 (Heisei 25) January 2013 (Heisei 25) | As part of the Great East Japan Earthquake reconstruction efforts, the Dela-wrapped train "Koko Kara-go" begins operation on the Sanriku Railway Kita-Riasu Line in Iwate Prefecture. |
| May 2013 (Heisei 25) May 2013 (Heisei 25) | As part of our support for the recovery from the Great East Japan Earthquake, we are hosting the "Yamamoto Junko Charity Concert" at Amber Hall in Kuji City, Iwate Prefecture, with the hope of "bringing energy and healing to everyone through music." (Guest: Erhu / Cao Xuejing) held |
| January 2016 (Heisei 28) January 2016 (Heisei 28) | Della's original healing background music business launched |
| March 2017 (Heisei 29) March 2017 (Heisei 29) | Research results of the therapeutic CD "Music for Fatigue Relief," which has proven to have healing and relaxing effects, have been published in an international academic journal |
| January 2018 (Heisei 30) January 2018 (Heisei 30) | Tokyo Metro Hibiya Line broadcasts soothing background music in-car to create a more comfortable interior space. |
| November 2019 (Reiwa 1) November 2019 (Reiwa 1) | Launch of Japan's first sound-based listening supplement application, "Sound Supple" |
| December 2020 (Reiwa 2) December 2020 (Reiwa 2) | Moved to current address |
| December 2023 (Reiwa 5) December 2023 (Reiwa 5) |
Official National Park Partnership concluded with the Ministry of the Environment 
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| December 2024 (Reiwa 6) December 2024 (Reiwa 6) |
Certified as a "Tokyo Sports Promotion Company for 2024" by the Tokyo Metropolitan Government 
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| September 2025 (Reiwa 7) September 2025 (Reiwa 7) | Exhibiting at the Ministry of the Environment exhibit at EXPO 2025 Osaka/Kansai Expo, showcasing the charms of national parks through the Nature Sound Gallery |