A former president of Liquid Audio Japan, an Internet-based music delivery firm, was arrested with four other people Wednesday on suspicion of kidnapping and confining a former executive of the firm.

The arrested include Masafumi Okanda, 32, the former company president, and Tsutomu Kaizuka, 42, an executive at a finance company, Metropolitan Police Department officials said.

According to the MPD, the suspects conspired to kidnap the 33-year-old victim, then a board member of Liquid Audio, in June 1999 from a Tokyo hospital. The victim was not identified.