•                                
  Conference
  　/ Lecture by Keiichi Itatani at the 62nd General Meeting of the Japanese Society of Pulses, October 14 (Thur) to October 16 (Sat), 2021
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  Conference
  　/ Lecture by Keiichi Itatani @ Asia-Pacific Pediatric Cardiac Society, July 17~18 (Sat, Sun), 2021 (Japan)
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  Conference
  　/ July 10, 2021 (Sat) Keiichi Itatani Lecture at the 57th Annual Meeting of the Japanese Society of Pediatric Cardiology
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  Conference
  　/ Friday, November 5, 2021 Keiichi Itatani Lecture at Symposium of the 41st Annual Meeting of the Japanese Society of Clinical Anesthesiology
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  Conference
  / Thursday, July 1, 2021 Lecture by Keiichi Itatani at “MIRAI x Academy of Circulation Dynamics
•                                
  Conference
  / July 9 (Fri) – 11 (Sun), 2021 Keiichi Itatani (Chair) at the 57th Annual Meeting of the Japanese Society of Pediatric Cardiology
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  Conference
  Dr. Itatani’s lecture＠Asian Oceanian Congress of Radiology
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  Conference
  Presentation at The 84th Annual Scientific Meeting of the Japanese Circulation Society
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  Conference
  Presentation at The 22th Annual Meeting of Japanese Society for Adult Congenital Heart Disease