He graduated from Keio University and London College of Fashion.
He studied fashion drawings at Grand de Chaumiere in Paris.
Upon return to Japan, he established haute couture maison in1972.
He serves his a wide range of customers of the members of the royal families, wives of diplomatic corps, politicians, business leaders and dignitaries, providing the wardrobe of ultimate beauty. He challenges to show his new creation in his collection held twice a year.

1947 Born as the second son to the Watanabe family, the owner of Ichibankan store, an upscale tailor, in Ginza, Tokyo.
1969 Upon graduation from Keio University, Tokyo, he left for Europe.
After finishing the London College of Fashion, he served an apprenticeship at La Chasse, the traditional European dressmaker, and studied fashion drawing at the Institute of Grand de Chaumiere in Paris.
1972 Established a luxurious haute couture Koji Atelier at Ginza with Mr. Jean-Paul Dunand, the Givenchy Paris ex-worker.
1983 At the invitation of the Royal Collection, patronaged by the British Royal Family, he showed his designer garments at The London Mansion House.
1984 Appeared in the magazine, Paris Vogue, (December 1st edition), featured as a leading fashion designer in Ginza, Tokyo.
1985 At the second invitation of the Royal Collection, he showed his designer garments at the Parliament House in Edinburgh, and appeared in the article of interview in the French Newspaper, Liberation.
1989 Showed his designer garments at the Royal Collection in Edinburgh.
His garments have been permanently displayed at the Royal Museum in Scotland.
1991 Under special patronage of the British Royal Family, his designer garments were presented to HRH Princess Ann at Buckingham Palace.
He became the first Japanese fashion designer whose garment was commissioned and actually worn by the British Royal Family member who has the right to the succession to the throne.
1996 Appointed as Princess Yamato’s formal garment designer at the bi-millennium anniversary of Ise Shrine.
1998 Held a Fashion Show for the Chinese celebrities in Beijing.
1999 Held a Fashion Show for the Chinese celebrities for the second time in Beijing.
2001 Held his show at the Italian Ambassadorial residence. He became the first Japanese fashion designer selected to for such event.
2004 Held Exhibition of Fashion Drawings in Sumi Brush Ink at the Nippon Gallery, New York.
2004 Held a high class Fur Fashion Show in collaboration with Dominique Ouzilleau at the Canadian Embassy, Tokyo.
2006 Made appearance at a TV fashion program, “Oshare-Koubou,” on NHK.
2008 lectured at Tamagawa University, College of Arts, Department of Visual Arts.
2008 lectured on “Creation of Koji Watanabe” at Bunka Fashion Graduate University.
2010 Held “KOJI WATANABE FASHION SHOW in Shanghai” at Shanghai World Financial Culture & Media Center, in celebration of The Shanghai Expo.
2012 Held the collection of the new brand, “Ginza 陽弘,” at Shangri-La Hotel Chengdu, Tied up with Chengdu TV(CDTV)
2013 Held Collection in celebration of 40th anniversary of Koji Atelier at Palace Hotel Tokyo.
1978 Born as the first daughter of Koji Watanabe.
1989 Went to Keio Yochisha Primary school.
2001 Upon graduation from Keio University, faculty of Letters, entered
Takashimaya Co.Ltd.
2006 Went to Paris and mastered draping at Ecole de la Chambre Syndicale de la Couture Parisienne and acquired fashion drawing by Lecturer Dominique Pullen.
2007 Returned to Tokyo and entered Tokyo Style Co. Ltd. as an assistant designer of the brand “Koji Watanabe Style.
2008 Joined “Koji Atelier” and appointed assistant designer of Koji Watanabe
2009 Gave birth to the first baby girl, and launched her own brand for maternity,
“En ste”
2012 Gave birth to the second baby girl and hold the collection of the new brand, “Ginza YOUKOU” at Shangri-La Hotel in Chengdu, China with her father, Koji Watanabe.