Item stuck in Tokyo JR "lost and found" station, not in Japan anymore

Item stuck in Tokyo JR "lost and found" station, not in Japan anymore - From above of unrecognizable people walking near road and modern Shinjuku Station located against cloudless blue sky in Tokyo

I lost my phone in the Shinkansen two days ago, and someone bring it back to the Tokyo JR lost and found station. The problem is I had to take my plane back to France before possibly recover my phone. They do not send item back and I don't know anybody in Japan.

Is there a solution for me to recover my phone?

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Item stuck in Tokyo JR "lost and found" station, not in Japan anymore - Mt. Fuji

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Images: WENCHENG JIANG, Hakan Nural, Yumiko Yamanaka, Stephen Tam