| April 2000 | Partnership with Tree Climbers International (TCI), USA |
| April 2001 | Launched the online gear shop “TREE CLIMBING® WORLD” |
| June 2001 | Established NPO Tree Climbing Japan |
| June 2003 | Established Tree Climbing World Yugen Kaisha (limited company) |
| April 2005 | Operated the Growing Village Pavilion at the 2005 World Exposition, Aichi, Japan (Expo 2005 Aichi) |
| December 2006 | Established the Japan Arborist® Association (JAA) |
| April 2007 | Launched the Arborist® Training Team, the forerunner of the Arborist® Training Institute (ATI) |
| May 2007 | Received the 1st Kids Design Award from the Kids Design Association (NPO) |
| April 2013 | Established the Arborist® Training Institute (ATI) |
| August 2017 | Published Special Education Textbook for Rope Work at Height (Tree Work) (National Forestry Extension Association in Japan) |
| August 2018 | Published the Japanese translation of ISA-Approved Text: The Art and Science of Practical Rigging for Arborists® (National Forestry Extension Association in Japan) |
| August 2019 | Published the Japanese translation of Arborist® Basic Text: Climbing, Rigging and Tree Care Techniques (National Forestry Extension Association in Japan) |
| April 2020 | Formed a capital alliance with Hyakugo Mirai Investment Co., Ltd. |
| December 2020 | Reorganized as Tree Climbing World Co., Ltd. |
