Hirofumi Otsuka (大塚 博文, Ōtsuka Hirofumi; born 8 October 1947) is a Japanese speed skater. He competed in the men's 10,000 metres event at the 1968 Winter Olympics.
Source: “Hirofumi Otsuka”, English Wikipedia (CC BY-SA 4.0), excerpt
Hirofumi Otsuka (大塚 博文, Ōtsuka Hirofumi; born 8 October 1947) is a Japanese speed skater. He competed in the men's 10,000 metres event at the 1968 Winter Olympics.
Source: “Hirofumi Otsuka”, English Wikipedia (CC BY-SA 4.0), excerpt