www.frontiersin.org (23.07.2026) The services that are not covered by the long-term care insurance play a critical role in supplementing the public care system in the aging society of Japan. Their combination with technologies of the shared economy is not only an extension of the shared economy into the specialized service market, but it is also a natural demand of the market in the long-term care service market that is the necessity to innovate and develop. This study constructed a technology acceptance extension model, using the Tokyo area as the survey scope. 486 valid samples were collected through a questionnaire survey, and partial least squares structural equation modeling was used to conduct hypothesis testing and empirically analyze the acceptance behavior of the older adult towards shared service platforms outside of long-term care insurance. The main findings are: (1) Scene characteristics may have a reshaping effect on the local behavior of the older adult in technology acceptance. (2) The single cognitive load of new technology in old scenes and the dual cognitive load of new technology in new scenes may be key to whether the older adult technology acceptance behavior undergoes local reshaping. (3) The “first principle” of perceived ease of use in the cognitive logic of the older adult group is emphasized. (4) The “external social construction” of perceived usefulness and the “endogenous individual defense” of perceived risk may be the unique cognitive logic of acceptance behavior in such scenarios.