This appears to be a radio transmission log message. Here's a breakdown of what it might mean:

* `07:42`: The time the message was sent or received.

* `JK1KIB/1`: The call sign of the station that transmitted the message. Call signs usually start with a country code (e.g., JK for Japan), followed by a unique identifier for the station or operator.

* `/1` suggests that this is a simplex transmission, meaning it's a single frequency used by the station.

* `on JP-1226`: The location where the transmission took place. In this case, it's likely a reference to a specific grid square or map coordinate (JP-1226) in Japan.

* `(Ogunohara Prefectural Park, JP-TK)`: Additional information about the location, including a specific park name and another geographic identifier (JP-TK).

* `1295060 FM`: The frequency of the transmission, which is 129.5060 MHz on the FM band.

* `QRT TU[JK1KIB/1]`: This likely indicates that the transmission has ended (QRT = "quiet radio time") and was made by JK1KIB/1 as its own transmission.

In short, this message appears to be a log entry from someone operating a ham radio or similar device, documenting their activity on a specific frequency at a particular location.