Ki-43s. The plane at the bottom left appears to have 54th sentai markings. The 54th was reportedly tasked with home island defense from 1941 onward, so this was likely taken in Japan.
Intetesting.. the Soviets reached the Odra river in February 1945. In January 1945 they still standing at the Vistula river. So what they did there in December 1944?