外そと房ぼう線せんFreq.FrequencyTop 100,000Meanings1nounSotobō LineserviceA railway line in Chiba Prefecture, Japan, operated by JR East. The name refers to the outer (Pacific) side of the Bōsō Peninsula.外そと房ぼう線せんで千ち葉ばから勝かつ浦うらまで行いった。I went from Chiba to Katsuura on the Sotobō Line.
