This appears to be a radio transmission message. Here's a breakdown of what it likely means:

* "09:12" is the time of day.

* "JK1JXP/1" is the call sign of the transmitting station. In amateur radio, the format is usually Country Code (CC) + serial number + suffix. "JK" represents Japan, and "1JXP" appears to be a unique identifier for this station, with "/1" indicating that it's operating on one transmitter.

* "JP-1238(Johoku-Chuo Prefectural Park, JP-TK)" is the location of the transmission site. The format seems to be:

+ Country code (CC)

+ Region or province identifier

+ City or park name

+ State or prefecture abbreviation

In this case:

- "JP" represents Japan.

- "1238" could be a specific region, city, or park within Chuo Prefecture.

- "(Johoku-Chuo Prefectural Park)" is the name of the park in English, and possibly an identifier for it.

- "(JP-TK)" might represent the state or prefecture (Chuo Prefecture) where the park is located.

* "145180 FM" indicates that the transmission is on a specific frequency (145.18 MHz) and mode (FM - Frequency Modulation).

* "[JK1JXP]" appears to be a bracketed comment, possibly indicating the owner or operator of the transmitting station (in this case, JK1JXP).

This message likely pertains to an amateur radio transmission from Japan, specifically from a station located within Johoku-Chuo Prefectural Park.