In 1998, Andrii Berezhnyi Sensei organized the first Yoshinkan Aikido seminar in Ukraine with master Jacques Muguruza Shihan
Since 1998, has organized annual international seminars with Aikido masters: Kyoichi Inoue Kancho, Tsutomu Chida Soke, Tsuneo Ando Shihan, Yukio Utada Sensei, Joe Tambu Shinan, Jacques Muguruza Shihan, Kenji Ito Sensei, David Rubens Sensei, Saburo Takashima Sensei, Kenji Nakazawa Sensei
Since 2001, has held seminars in Brno (Czech Republic), New York (USA), and Będzin (Poland)
In 2018, participated in the Senshusei Course (intensive instructor course) at Aikido Renshinkai Honbu Dojo, Tokyo, Japan
In 2019, underwent an internship at Aikido Shudokan in Melbourne, Australia, under the main instructor Joe Tambu Shihan
In 2023, left the Aikido Renshinkai organization
In January 2025, Sensei Andrii Berezhnyi received the 7th Dan and the title of Shihan from Tsuneo Ando Shihan, 9th Dan