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  1. Ryusendo Top
  2. About Ryusendo

company data

  • Corporate Outline
  • company profile
  • associated company
  • company history
  • main ingredients

Corporate Outline

Greeting from the President

In the Eastern part of the world, food has been considered the best medicine and the most important secret to longevity for many centuries.

Based on this principle, we have directed our efforts toward the discovery of “food that can be as good as medicine” and have released a number of health foods and dietary supplements since our foundation. In particular, a variety of rigorous tests have proven that supplement containing undenatured type II collagen and nutritional food containing onion extract, are confirmed to have many beneficial bioactive effects, to be very safe, and are also highly acclaimed by medical and nutrition experts.

Scientific study on the functionalities (bioactive effects) of food has begun on a very small scale. However, it surely will be of great help in the expansion of the new horizons of medicine in the near future. This means that soon will come a day when food supported by scientific evidence will be the standard. Motivated by these future prospects, we strive to develop safer, highly functional, and unique products.

company profile

corporate name
Ryusendo Co., Ltd.
head office
1-5-3 Nishi-ikebukuro, Toshima-ku, Tokyo 171-0021, Japan
Phone +81-3-3985-8346
FAX +81-3-3981-1349
September 16, 1981
54 millions yen
Yoshiaki Shiojima
Manufacturing and sales of supplements
Import and export of raw materials for health foods & cosmetics
Publication of books for foods & health
main products
Kansetsu no Tomo(Capsule of undenatured type II collagen)
Vita-Onion(Tablet of onion extract)
Kabocha-Onion(Tablet of onion & pumpkin extract)
Neochlon G(Tablet of germanium-contained-Spirulina)
Nensho Syukan(Granulated powder of Garcinia cambogia extract)
Knight of Night Dragon(Tablet of Tongkat ali extrat & L-citrullin)
Glucopolysaccharide(Tablet of β-1,3/1,6-glucan)
DetoSlim(Sachet of Cassia alata extract)
Immuno one AQUA GEL(Yeast β-glucan containing skin care gel)

associated company

  • Mylife Co., Ltd.
  • Pegasus Co., Ltd.
  • R.K.C Co., Ltd.
  • Shinsyuhakko Foods, Inc.
  • Ishoku kenbi Co., Ltd.

company history

September, 1981
Established by Tsutomu Yae
June, 1983
Launched “Neochlon G,” a spirulina tablet containing germanium
(Patented for manufacturing in Japan, USA, UK, France and Switzerland)
March, 1989
Launched “Vita-Onion,” an onion extract tablet
November, 1994
Launched “Ron Grape,” a granulated ampelopsis extract powder
February, 2004
Launched “Kabocha-Onion,” a pumpkin and onion extract (OPtain®120) tablet
May, 2006
Introduced garcinia cambogia extract (Super CitriMax®) on behalf of InterHealth Nutraceuticals, Inc. (USA)
June, 2006
US patent for “Kabocha-Onion” acquired
February, 2007
Introduced undenatured type II collagen (UC-II ®) from InterHealth N. I.
Launched “Kansetsu no Tomo,” an undenatured type II collage capsule
June, 2007
Introduced multi-berry extract (OptiBerry®) from InterHealth N. I.
Launched “Bikenka,” a multi-berry extract capsule
December, 2007
Launched “Nensho Shukan,” a granulated Garcinia cambogia extract powder
November, 2009
Introduced Cassia alata extract (DetoSnna®)
Launched “Deto Slim®,” a sachet of Cassia alata extract
March, 2010
“Vita-Onion” patented
October, 2010
Introduced tongkat ali (Eurycoma longifolia) extract
Launched “Knight of the Night Premium,” a sachet of tongkat ali extract with L-citrullin tablets
March, 2011
Re-launched “Deto Slim®”
April, 2011
Yoshiaki Shiojima appointed president & CEO
Introduced irvingia gabonensis extract
May, 2012
Head office moved to Nishi-ikebukuro, Tokyo
September, 2012
Introduced Wellmune® (Gluco-polysaccharide: β-1,3 / 1,6-glucan) in Japan
August, 2013
ISO9001:2008 certification acquired (Manufacturing Control and Sale of Dietary Supplements)
April, 2014
Launched “iSports® Slim,” an irvingia gabonensis extract powder (Wild mango extract), and Wellmune®, a gluco-polysaccharide capsule
August, 2014
Launched “Immuno One AQUAGEL,” gluco-polysaccharide skin care gel
September, 2015
Consumer Affairs Agency accepted “Kansetsu no Tomo,” an undenatured type II collagen capsule, as a “Food with Functional Claims”
January, 2016
Launched “Kansetsu no Tomo” as a “Food with Functional Claims” supplement
May, 2017
Introduced “PandoraBeauty®” from NewTree Co., Ltd.
Octorber, 2017
Introduced “CogniUp®” from Cepham,Inc.
Consumer Affairs Agency accepted “Body Challenge” an Ellagic acid derived from Irvingia gabonensis tablets , as a “Food with Functional Claims”
January, 2018
Launched “Densetsu no Megami”, Fingerroot extract powder, Irvingia gabonensis extract powder, pineapple extract powder and Vitamin C capsule
February, 2018
Launched “Body Challenge” as “Food with Function Claims” supplement
May, 2018
Launched “Huperun A capsule”, Chinese club moss capsule
September, 2018
Held an academic seminar
May, 2019
Launced “Knight of Night Dragon”, a sachet of Tongkat ali extract with L-citrullin Tablets
September, 2019
Held an academic seminar
February, 2020
Introduced “mnemo PQQ”

main ingredients

  • UC-Ⅱ® (Undenatured type II collagen extract)
  • IGOB131® (Irvingia gabonensis extract)
  • Wellmune® (Gluco-polysaccharide; β-1,3/1,6-glucan)
  • DetoSenna® (Cassia alata extract)
  • Vita-Onion® powder (Onion extract; made in Japan)
  • Optain120® (Pumpkin and Onion extract; made in Japan)
  • PandoraBeauty® (Fingerroot extract)
  • mnemo PQQ (Pyrroloquinoline quinone)
  • Super CitriMax® (Garcinia cambogia extract)
  • OptiBerry® (Multi-berry extract)
  • Tongkat ali extract
  • GrapeSorac® (Grape seed extract)
  • Yeast β-glucan (Cosmetic ingredient)