You know how it goes. The phone rings at 3 a.m., and you tumble out of bed, mumbling a sleepy "moshi moshi" into the receiver.
"Hi there! This is a former classmate / the guy you met in Thailand last spring / your dad's best friend. Guess what? I'm in Japan next week and was wondering if you could show me around Kyoto."
Great. A trip to Kyoto, dragging somebody you barely know around temples and shrines neither they nor you really have much interest in. A trip to a cranky dentist would be more fun.