Tomakomai Hasukappu Triathlon (Hokkaido)
Ajigawsawa Triathlon (Aomori) 
Taiheiyo Triathlon in Iwaki (Fukushima)
Maebashi Mini Triathlon (Gunma)
Teganuma Triathlon (Chiba)
Love Triathlon (Hyogo)
Nanki Shirahama Triathlon (Wakayama)
Biwako Triathlon in Omi Hachiman (Shiga)
Osaki Kamijima Triathlon (Hiroshima)
Triathlon Sagishima (Hiroshima)
Hatsukaichi Miyajima International Power Triathlon (Woodman) (Hiroshima)
Miyakojima Triathlon (Okinawa)
Ainan Triathlon (Ehime)
Fukuoka Triathlon (Fukuoka)
Nagasaki Saikai Triathlon (Nagasaki)
Goto Nagasaki International Triathlon (Nagasaki)
Triathlon in Tokunoshima (Kagoshima)
Nijima Triathlon – Tokyo Island Series (Tokyo)
Suwako 8 Peaks Triathlon (Nagano) [postponed to 2022]
Sado International Triathlon (Niigata) 
Izu Ohshima Triathlon – Tokyo Island Series (Tokyo)
Lake Biwa Triathlon in Moriyama (Shiga) [postponed date TBA]
Yusuichi Fureai Triathlon (Gunma) [cancelled]
Nagaragawa Middle Triathlon 102 (Gifu) [postponed to Sep 26]
Kisakata Triathlon (Akita) [cancelled on April 30; was scheduled  for July 18]
Triathlon Suzu (Ishikawa) [cancelled on May 12]
Miyagi International Triathlon – Sendai Bay Shichigahama (Miyagi) [cancelled on May 12]
Kiso Sansen Triathlon (Gifu) [cancelled on May 17]
Miyazaki Sea Gaia Triathlon (Miyazaki) [cancelled on May 19]
Kisarazu Triathlon (Chiba) [cancelled on May 20]
Notojima Triathlon (Ishikawa) [cancelled on May 21]
Igosso Aquathlon (Kochi) [cancelled on May 21]
Showa Kinen Koen Triathlon (Tokyo) [cancelled on May 22]
Utsukushima Triathlon in Aizu (Fukushima) [cancelled on May 25]
Nojiriko Triathlon (Nagano) [postponed on May 27 from July 4 to September 5]
Watarase Triathlon (Tokyo) [cancelled on May 29]
Gamagori Orange Triathlon (Aichi) [cancelled on May 31]
Sagae Triathlon Festival (Yamagata) [cancelled on May 31]
Nagaragawa International Triathlon (Gifu) [postponed on June 1 from July 18 to September 19]
Izena 88 Triathlon (Okinawa) [cancelled on June 1; was scheduled for Nov 7)
Murakami Triathlon (Niigata) [cancelled on June 2; was scheduled for Sep 26)
Kasumigaura Triathlon Festa (Ibaraki) [cancelled on June 2; was scheduled for Fall 2021]
Ise Shima Triathlon (Mie) [cancelled on June 15; was scheduled for July 4]
Kaike Triathlon (Tottori) [cancelled on June 15; was scheduled for August 29]
Kawazu Flower Triathlon (Shizuoka) [cancelled on July 30; was scheduled for October 31]
Imabari Triathlon (Ehime) [cancelled on August 3; was scheduled for August 29]
Numazu Triathlon (Shizuoka) [postponed on August 4; rescheduled to October 31, was scheduled for August 22]
Sunport Takamatsu Triathlon (Kagawa) [cancelled on August 5; was scheduled for September 12]
Yokohama Seaside Triathlon (Kanagawa) [cancelled on August 5; was scheduled for September 26]
Sunrise Iwata Triathlon (Shizuoka) [cancelled on August 9; was scheduled for September 26]
Triathlon Irago (Aichi) [cancelled on August 16; was scheduled for September 12]
Amakusa Takarajima International Triathlon (Aichi) [rescheduled from June 6 to September 19; cancelled on August 17]
Maebashi Triathlon Festa (Gunma) [cancelled on August 23; was scheduled for October 3]
Nagaragawa International Triathlon (Gifu) [postponed on September 1 from September 19 to July 17, 2022]
Nagaragawa Middle Triathlon 102 (Gifu) [scheduled for May 23, postponed to September 26, 2021 on May 10 | postponed to May 29, 2022 on September 6, 2021]
Kawasaki Port Triathlon (Kanagawa) [cancelled on September 8; was scheduled for October 3]
Yokosuka Beach Aquathlon (Kanagawa) [cancelled on September 10; was scheduled for September 18]