The Ryuko Dojo Berlin is led by Ben Warzecha and Anna Buttkus.
Ben Warzecha has been training in Bujinkan since 1999 and was a student of different teachers for many years. He has now been living and training in Berlin since 2002, where he also teaches regularly.
In addition, Ben has participated and continues to participate several times a year in seminars at home and abroad, which are led by international Bujinkan teachers.
Since 2005, he has travelled to Japan every year to learn from Grandmaster Dr. Masaaki Hatsumi and the Japanese Shihan.
In February 2010, under the supervision of Soke Hatsumi, he successfully passed the 5th Dan examination at the Hombu Dojo in Japan and was awarded the title of Shidoshi (jap. 指導師 = “teacher who shows the way”), which gives him full teaching and examination authority. During one of his trips, he was advised to open his own dojo.
In 2018, he was awarded the 15th Dan (Jūdan Kugyō) by Nagatō Sensei in Japan and the Daishihan certificate in 2019.
Anna Buttkus started training in Bujinkan in 2001 with Philip Dao in the Tendo Dojo Berlin Kreuzberg, here she received her 2nd Dan from Brin Morgan and Natascha Tomarkin Morgan. She participated in numerous seminars and courses of different Shihan in Germany and abroad and regularly travels to Japan for training.
In 2012 she passed the 5th Dan examination at the Hombu Dojo, and in autumn 2018 Soke Hatsumi awarded her the 15th Dan (Jūdan Kugyō) there.
Anna has been teaching beginners and advanced students in the former Tendo Dojo for many years and, together with Dorothee Dao, leads weekend seminars on the topic of self-protection for female judges and public prosecutors at the Justice Academy of the State of Brandenburg.
At the turn of the year 2021/22, Anna Buttkus and Ben Warzecha took over the Tendo Dojo from Philip Dao and now run it under the name Ryuko Dojo.
Michael 
Ingo 
Susan 
Robert
In the Ryuko Dojo Berlin, around several dozen adults now train three days a week. A total of six highly qualified trainers (see above) support them in conducting the classes according to a uniform, coordinated overall concept. All trainers attach great importance to creating optimal conditions for the trainees to learn successfully. This includes a challenging training programme and a relaxed training atmosphere.