It appears to be a log entry from a radio amateur or ham radio operator. Here's a breakdown of the information:

* `04:28`: The time of day in hours and minutes.
* `JK1XUQ`: The call sign of the transmitting station, which is likely an amateur radio license plate issued by Japan.
* `JP-0010` : The location or grid square where the transmission was received. In this case, it's a specific geographic area within Japan, possibly referring to Nikko National Park.

The other abbreviations seem to be related to modes of operation and frequency bands:

* `FM`: Frequency modulation mode
* `432900`: A frequency in MHz (megahertz) that the transmission was received on.
 
So, this log entry suggests that a ham radio operator with the call sign JK1XUQ transmitted on FM at 432.9 MHz from within Japan, and was received by another station possibly using the same mode and frequency.