It appears to be a text message about amateur radio activity. Here's a breakdown of the information:

* `00:37`: Time in hours and minutes.

* `JA6SZV/P`: The callsign of an amateur radio operator, indicating they are operating portable (P) from their home station (JA6).

* `on JP-1900(Chiba Prefectural Funabashi Forest...`): The location where the operator is transmitting. This appears to be a park in Chiba Prefecture, Japan.

* `JP-CH`: A possible reference to the IOTA (Islands on the Air) or JARTS (Japanese Amateur Radio Transceiver Society) system for identifying locations.

* `144460 FT8`: The operating frequency and mode of transmission. In this case, it's 144 MHz, which is a common frequency range for amateur radio operators in Japan, using the FT8 digital mode.

In essence, this message is announcing that an amateur radio operator (JA6SZV) is transmitting on the specified frequency and location, using the FT8 mode.