This PoC verified the feasibility of end-to-end (E2E) data protection architectures for Green Computing with Remote GPU over APN using the LLM tsuzumi. It demonstrated that, even with a data security configuration ensuring end-to-end confidentiality, the LLM training completion time in a remote access environment remains within 10% of that in a local connection environment. The PoC also clarified the impact of the data security configuration on training completion time and showed that utilizing a green data center can mitigate energy cost increases.