An English-language teacher in Tokyo who allegedly posted on the Internet nude photos of a woman he had been dating has been arrested on suspicion of defamation, police said Monday.

The Tokyo Metropolitan Police arrested Keefe Douglas, 39, of the United States, also for allegedly possessing 0.4 gram of amphetamines at his residence in Itabashi Ward, after searching the place Friday.

According to police, Douglas uploaded 44 photographs on a Web site of a 28-year-old Japanese woman on Dec. 30, including ones showing her naked.

Police said he then sent one of the woman's female colleagues an e-mail message containing the page's Internet address.

They said Douglas apparently decided to take the alleged action after the woman learned last summer that he was married and broke up with him.