References to Takahashi-san and Sasada-san are pretty frequent in the Ruby world and I wanted to be clear about how to interpret the -san suffix in the Japanese culture…

San

San (さん?) is the most common honorific title, used when addressing most social outsiders, for example, non-family members. San is used unless the addressee’s status warrants one of the other terms mentioned below.

San is often translated as “Mr.”, “Ms.”, “Mrs.”, and the like. San may also be used in combination with things other than the name of the person being addressed. For example, a bookseller might be addressed as honya-san “Mr. Bookseller”, and a butcher as nikuya-san “Ms. Butcher”.