A sign reads “Watch Out For Mamushi Vipers” in the city of Akishima, western Tokyo, along the Tamagawa river cycling path. The Akishima Police Station and the city’s crime prevention association call for caution regarding the poisonous snake. If you go out cycling, poisonous snakes are not the only things you should be careful of. Please protect yourself from bugs and ultraviolet radiation with insect repellent and sunscreen. But more than anything, don’t forget to ride safely.