| Apr. 2023 | Number of childcare facilities operated by Kids Corporation Holdings Inc. exceeds 250 | 
      
        | Nov. 2020 | Beijing Kids Management Consulting Inc. is established in Beijing, China, as a 100%-owned subsidiary | 
      
        | Aug. 2020 | Strategic partnership formed with a Chinese company, and business operations commence in China | 
      
        | Jan. 2020 | Number of childcare facilities operated by Kids Corporation Holdings Inc. exceeds 200 | 
      
        | Nov. 2018 | Number of childcare facilities operated by Kids Corporation Holdings Inc. exceeds 150 | 
      
        | Jan. 2018 | Transition to a holdings structure, with Kids Corporation Holdings Inc. as the parent company and Kids Corporation Inc. as a subsidiary. Operations commence under new structure. | 
      
        | Nov. 2017 | Kids Corporation Holdings Inc. is established | 
      
        | Aug. 2017 | Number of childcare facilities operated by Kids Corporation Inc. exceeds 100 | 
      
        | Apr. 2016 | First licensed nursery school, “Ozora to Daichi Nursery, Omori Station” opens. | 
      
        | Apr. 2014 | Started operating a Nerima City-certified small-scale childcare facility. | 
      
        | Jan. 2013 | Number of childcare facilities operated by Kids Corporation Inc. exceeds 50 | 
      
        | Apr. 2012 | Started operating nursery schools within corporations. | 
      
        | Dec. 1997 | Entrustment of nursery school operation within hospitals commences | 
      
        | Feb. 1996 | Directly-managed facility "Peter Pan Nursery School" opens | 
      
        | May 1995 | Kids Corporation Inc. is established and incorporated | 
      
        | Dec. 1993 | Babysitter service "Peter Pan" is established, as the first specialized babysitting company in Tochigi Prefecture. |