|1943||Born in Tokyo, Japan.|
|1967-1969||Trained in Karate, Japan.|
|1970||Began Aikido training in Honbu Dojo/Tokyo. Taught mainly by Masters
Koichi Tohei, Yasuo Kobayashi, Massando Sasaki, Seiichiro Masudo
and Seishiro Endo
|1972||Went to Germany to study Theology in Frankfurt and receive a
Bachelors of Arts in Theology in 1976.
|1976||Met Master Kenji Shimizu and because his Uchideshi. Became the representative of Tendoryu in Europe after Master Shimizu became Independent from Aikikai.|
|1978||Founded the Aikido club at the Ganztags High School in Osterburken.|
|1983||Became independent from Master Shimizu and founded Shinkido. Together with Susanne established the Shiki Dojo as the central Dojo of Shikiryu Aikido.|
|1987||Studied with Master Seigo Yamaguchi, Nobuyoshi Tamura, Morihiro Saito, Kyouichi Inoue (Yoskinkan) and Takeshi Kimeda (Yoshinkan).|
|1989||Met Master Katesumi Yonezawa of Daitoryu Aiki Jujutsu Kodokai in Munich where he was a teacher in a Japanese School. Began to learn from him.|
|1994||Entered Aikikai through the recommendation of Master Yamaguchi.
Shinkiryu Aikido was renamed Aikido Shinki Rengo.
|1995||Awarded 5th Dan in Aikido by Master Yamaguchi.|
|1996||Yonezawa Sensei officially founded Bokuyokan. Nakajima became Bokuyokan representative in Europe.|
|1998||11/27/1998 Yonezawa Soshi Shihan passed away.|
|1999||Nakajima became European Jun-Honbu-Chofor the Bokuyokan. Nakajima Shihan along with Tim Tung Shihan support the son of Yonezawa Soshi Shihan, Sensei Hiromitsu as the new Soke of Daitoryu Aiki Jujustu Bokuyokan.|
|2002||Awarded the title of Shihan by Hiromitsu Yonezawa Soke.|
|2004||Awarded 6th Dan in Aikido from the Aikido Honbu Dojo through Nobuyoshi Tamura Sensei.|
|2005||Awarded 8th Dan Certificate from Hiromitsu Yonezawa Soke (Bokuyokan).|