An announcer for NHK was served a fresh arrest warrant Friday on suspicion of making narcotics at his home.

Kenichi Tsukamoto, 37, was arrested earlier this month for possessing so-called kiken (dangerous) drugs, hallucinogenic compounds that until recently were known as dappo (loophole) drugs not proscribed by law. They contain chemical agents that have similar effects to illegal narcotics.

Tsukamoto admitted producing a certain amount of the drugs for his personal use, officials of the health ministry's narcotics control unit said.

He allegedly produced drugs containing controlled substances in his apartment in Tokyo in early January in violation of the pharmaceutical and medical device law, and the unit is investigating how he acquired the ingredients, the officials said.

On Jan. 10, Tsukamoto was arrested on suspicion of possessing those drugs, and equipment and materials were confiscated.

Tsukamoto joined NHK in 2003 and has appeared on TV news programs.