B20 steam locomotive is a small-sized locomotive for the short distance transport. From 1944 to 1946, the manufacturing industies, Tateyama, and JNR Kouriyama Works, had produced 15 trains of this class. Now 2 of the trains are being kept at Umekouji steam locomotives museum and another museum. I read a news from somewhere that it had been reconstructed in 2002. If you want to see the close up picture of it try check it here, JNR's Steam locomotive B20 class.