A Morse code message!

Here's the breakdown:

`05:57` is the time (HHMM format)

`JK3OTH` is the call sign of the station (a Japanese amateur radio operator, judging by the prefix "JK")

`/3` indicates that this transmission is a 3-minute duration report

`on JP-0132(Biwako Quasi-National Park, JP-KY,JP-SH)` specifies the location where the station is transmitting from. This includes:

* `JP-0132`: A Japanese amateur radio reference number for the Biwako area (Biwa Lake region)

* `(Biwako Quasi-National Park)`: The name of the park or geographic feature

* `(JP-KY, JP-SH)`: The prefectures where the transmission is taking place (Kyoto and Shiga)

`433100 FM fm nyp[JK3OTH/3]`

This part appears to be a simple report message:

* `433100 FM`: The frequency of the transmission (43.310 MHz on the FM band)

* `fm`: This might indicate that the transmission is in FM voice mode

* `nyp`: Unclear, possibly an abbreviation or typo?

* `[JK3OTH/3]`: A bracketed section containing the call sign and transmission duration report again.

Keep in mind that amateur radio transmissions often involve shorthand and technical jargon specific to the community. Without more context or knowledge of Japanese amateur radio practices, it can be challenging to fully understand this message.