This is a sign found at a public lavatory in Kyoto indicating men's room.
As you can see the man in the picture is dressed in Kimono...looking a bit like Samurai... Well, no worry, you don't need to be a samurai to use a public lavatory in Kyoto, but in Nara there is an interesting rule to use a public lavatory. Which is you need to be a human! Public lavatories around Nara Park have a gate to prevent deer coming inside and eat toilet papers.
When you have a chance to use one in Nara, please remember to close the gate, or you might be sharing your very private time with deer...
P.S. For your interest, the public lavatory with samurai sign is located near Sanjusangendo Temple.